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#' Create a new {{{classname}}}
#'
#' @description
#' {{{description}}}{{^description}}{{classname}} Class{{/description}}
#'
#' @docType class
#' @title {{classname}}
#' @description {{classname}} Class
#' @format An \code{R6Class} generator object
{{#vars}}
#' @field {{name}} {{#lambdaRdocEscape}}{{{description}}}{{/lambdaRdocEscape}} {{{vendorExtensions.x-r-doc-type}}}{{^required}} [optional]{{/required}}
{{/vars}}
{{#isAdditionalPropertiesTrue}}
#' @field _field_list a list of fields list(character)
#' @field additional_properties additional properties list(character) [optional]
{{/isAdditionalPropertiesTrue}}
#' @importFrom R6 R6Class
#' @importFrom jsonlite fromJSON toJSON
#' @export
{{classname}} <- R6::R6Class(
  "{{classname}}",
  {{#parent}}
  inherit = {{{.}}},
  {{/parent}}
  public = list(
    {{#vars}}
    `{{{name}}}` = NULL,
    {{/vars}}
    {{#isAdditionalPropertiesTrue}}
    `_field_list` = c({{#vars}}"{{{name}}}"{{^-last}}, {{/-last}}{{/vars}}),
    `additional_properties` = list(),
    {{/isAdditionalPropertiesTrue}}
    {{#discriminator}}
    `_discriminator_property_name` = '{{discriminator.propertyName}}',
    {{#discriminator.mappedModels}}{{#-first}}`_discriminator_mapping_name` = c({{/-first}}'{{mappingName}}' = '{{modelName}}'{{^-last}}, {{/-last}}{{#-last}}),{{/-last}}{{/discriminator.mappedModels}}
    {{/discriminator}}
    #' Initialize a new {{{classname}}} class.
    #'
    #' @description
    #' Initialize a new {{{classname}}} class.
    #'
    {{#requiredVars}}
    #' @param {{name}} {{#lambdaRdocEscape}}{{{description}}}{{/lambdaRdocEscape}}{{^description}}{{{name}}}{{/description}}
    {{/requiredVars}}
    {{#optionalVars}}
    #' @param {{name}} {{#lambdaRdocEscape}}{{{description}}}{{/lambdaRdocEscape}}{{^description}}{{{name}}}{{/description}}{{#defaultValue}}. Default to {{{.}}}.{{/defaultValue}}
    {{/optionalVars}}
    {{#isAdditionalPropertiesTrue}}
    #' @param additional_properties additional properties (optional)
    {{/isAdditionalPropertiesTrue}}
    #' @param ... Other optional arguments.
    #' @export
    initialize = function({{#requiredVars}}`{{name}}`, {{/requiredVars}}{{#optionalVars}}`{{name}}` = {{{defaultValue}}}{{^defaultValue}}NULL{{/defaultValue}}, {{/optionalVars}}{{#isAdditionalPropertiesTrue}}additional_properties = NULL, {{/isAdditionalPropertiesTrue}}...) {
      {{#requiredVars}}
      if (!missing(`{{name}}`)) {
        {{^isContainer}}
        {{#isEnumOrRef}}
        if (!(`{{name}}` %in% c({{#_enum}}"{{{.}}}"{{^-last}}, {{/-last}}{{/_enum}}))) {
          stop(paste("Error! \"", `{{name}}`, "\" cannot be assigned to `{{name}}`. Must be {{#_enum}}\"{{{.}}}\"{{^-last}}, {{/-last}}{{/_enum}}.", sep = ""))
        }
        {{/isEnumOrRef}}
        {{#isInteger}}
        if (!(is.numeric(`{{name}}`) && length(`{{name}}`) == 1)) {
          stop(paste("Error! Invalid data for `{{name}}`. Must be an integer:", `{{name}}`))
        }
        {{/isInteger}}
        {{#isLong}}
        if (!(is.numeric(`{{name}}`) && length(`{{name}}`) == 1)) {
          stop(paste("Error! Invalid data for `{{name}}`. Must be an integer:", `{{name}}`))
        }
        {{/isLong}}
        {{#isFloat}}
        if (!(is.numeric(`{{name}}`) && length(`{{name}}`) == 1)) {
          stop(paste("Error! Invalid data for `{{name}}`. Must be a number:", `{{name}}`))
        }
        {{/isFloat}}
        {{#isDouble}}
        if (!(is.numeric(`{{name}}`) && length(`{{name}}`) == 1)) {
          stop(paste("Error! Invalid data for `{{name}}`. Must be a number:", `{{name}}`))
        }
        {{/isDouble}}
        {{#isString}}
        if (!(is.character(`{{name}}`) && length(`{{name}}`) == 1)) {
          stop(paste("Error! Invalid data for `{{name}}`. Must be a string:", `{{name}}`))
        }
        {{/isString}}
        {{#isBoolean}}
        if (!(is.logical(`{{name}}`) && length(`{{name}}`) == 1)) {
          stop(paste("Error! Invalid data for `{{name}}`. Must be a boolean:", `{{name}}`))
        }
        {{/isBoolean}}
        {{#isDate}}
        if (!(is.character(`{{name}}`) && length(`{{name}}`) == 1)) {
          stop(paste("Error! Invalid data for `{{name}}`. Must be a string:", `{{name}}`))
        }
        {{/isDate}}
        {{#isDateTime}}
        if (!(is.character(`{{name}}`) && length(`{{name}}`) == 1)) {
          stop(paste("Error! Invalid data for `{{name}}`. Must be a string:", `{{name}}`))
        }
        {{/isDateTime}}
        {{#isUri}}
        # to validate URL. ref: https://stackoverflow.com/questions/73952024/url-validation-in-r
        if (!stringr::str_detect(`{{name}}`, "(https?|ftp)://[^ /$.?#].[^\\s]*")) {
          stop(paste("Error! Invalid data for `{{name}}`. Must be a URL:", `{{name}}`))
        }
        {{/isUri}}
        {{^isPrimitiveType}}
        stopifnot(R6::is.R6(`{{name}}`))
        {{/isPrimitiveType}}
        {{/isContainer}}
        {{#isContainer}}
        stopifnot(is.vector(`{{name}}`), length(`{{name}}`) != 0)
        sapply(`{{name}}`, function(x) stopifnot({{#isPrimitiveType}}is.character(x){{/isPrimitiveType}}{{^isPrimitiveType}}R6::is.R6(x){{/isPrimitiveType}}))
        {{#isArray}}
        {{#uniqueItems}}
        if (!identical(`{{name}}`, unique(`{{name}}`))) {
          stop("Error! Items in `{{name}}` are not unique.")
        }
        {{/uniqueItems}}
        {{/isArray}}
        {{/isContainer}}
        self$`{{name}}` <- `{{name}}`
      }
      {{/requiredVars}}
      {{#optionalVars}}
      if (!is.null(`{{name}}`)) {
        {{^isContainer}}
        {{#isEnumOrRef}}
        if (!(`{{name}}` %in% c({{#_enum}}"{{{.}}}"{{^-last}}, {{/-last}}{{/_enum}}))) {
          stop(paste("Error! \"", `{{name}}`, "\" cannot be assigned to `{{name}}`. Must be {{#_enum}}\"{{{.}}}\"{{^-last}}, {{/-last}}{{/_enum}}.", sep = ""))
        }
        {{/isEnumOrRef}}
        {{#isInteger}}
        if (!(is.numeric(`{{name}}`) && length(`{{name}}`) == 1)) {
          stop(paste("Error! Invalid data for `{{name}}`. Must be an integer:", `{{name}}`))
        }
        {{/isInteger}}
        {{#isLong}}
        if (!(is.numeric(`{{name}}`) && length(`{{name}}`) == 1)) {
          stop(paste("Error! Invalid data for `{{name}}`. Must be an integer:", `{{name}}`))
        }
        {{/isLong}}
        {{#isFloat}}
        if (!(is.numeric(`{{name}}`) && length(`{{name}}`) == 1)) {
          stop(paste("Error! Invalid data for `{{name}}`. Must be a number:", `{{name}}`))
        }
        {{/isFloat}}
        {{#isDouble}}
        if (!(is.numeric(`{{name}}`) && length(`{{name}}`) == 1)) {
          stop(paste("Error! Invalid data for `{{name}}`. Must be a number:", `{{name}}`))
        }
        {{/isDouble}}
        {{#isString}}
        if (!(is.character(`{{name}}`) && length(`{{name}}`) == 1)) {
          stop(paste("Error! Invalid data for `{{name}}`. Must be a string:", `{{name}}`))
        }
        {{/isString}}
        {{#isBoolean}}
        if (!(is.logical(`{{name}}`) && length(`{{name}}`) == 1)) {
          stop(paste("Error! Invalid data for `{{name}}`. Must be a boolean:", `{{name}}`))
        }
        {{/isBoolean}}
        {{#isDate}}
        if (!is.character(`{{name}}`)) {
          stop(paste("Error! Invalid data for `{{name}}`. Must be a string:", `{{name}}`))
        }
        {{/isDate}}
        {{#isDateTime}}
        if (!is.character(`{{name}}`)) {
          stop(paste("Error! Invalid data for `{{name}}`. Must be a string:", `{{name}}`))
        }
        {{/isDateTime}}
        {{#isUri}}
        # to validate URL. ref: https://stackoverflow.com/questions/73952024/url-validation-in-r
        if (!stringr::str_detect(`{{name}}`, "(https?|ftp)://[^ /$.?#].[^\\s]*")) {
          stop(paste("Error! Invalid data for `{{name}}`. Must be a URL:", `{{name}}`))
        }
        {{/isUri}}
        {{^isPrimitiveType}}
        stopifnot(R6::is.R6(`{{name}}`))
        {{/isPrimitiveType}}
        {{/isContainer}}
        {{#isContainer}}
        stopifnot(is.vector(`{{name}}`), length(`{{name}}`) != 0)
        sapply(`{{name}}`, function(x) stopifnot({{#isPrimitiveType}}is.character(x){{/isPrimitiveType}}{{^isPrimitiveType}}R6::is.R6(x){{/isPrimitiveType}}))
        {{#isArray}}
        {{#uniqueItems}}
        if (!identical(`{{name}}`, unique(`{{name}}`))) {
          stop("Error! Items in `{{name}}` are not unique.")
        }
        {{/uniqueItems}}
        {{/isArray}}
        {{/isContainer}}
        self$`{{name}}` <- `{{name}}`
      }
      {{/optionalVars}}
      {{#isAdditionalPropertiesTrue}}
      if (!is.null(additional_properties)) {
        for (key in names(additional_properties)) {
          self$additional_properties[[key]] <- additional_properties[[key]]
        }
      }
      {{/isAdditionalPropertiesTrue}}
    },
    #' To JSON string
    #'
    #' @description
    #' To JSON String
    #'
    #' @return {{{classname}}} in JSON format
    #' @export
    toJSON = function() {
      {{classname}}Object <- list()
      {{#vars}}
      if (!is.null(self$`{{name}}`)) {
        {{classname}}Object[["{{baseName}}"]] <-
          {{#isContainer}}
          {{#isArray}}
          {{#isPrimitiveType}}
          self$`{{name}}`
          {{/isPrimitiveType}}
          {{^isPrimitiveType}}
          lapply(self$`{{name}}`, function(x) x$toJSON())
          {{/isPrimitiveType}}
          {{/isArray}}
          {{#isMap}}
          {{#isPrimitiveType}}
          self$`{{name}}`
          {{/isPrimitiveType}}
          {{^isPrimitiveType}}
          lapply(self$`{{name}}`, function(x) x$toJSON())
          {{/isPrimitiveType}}
          {{/isMap}}
          {{/isContainer}}
          {{^isContainer}}
          {{#isPrimitiveType}}
          self$`{{name}}`
          {{/isPrimitiveType}}
          {{^isPrimitiveType}}
          self$`{{name}}`$toJSON()
          {{/isPrimitiveType}}
          {{/isContainer}}
      }
      {{/vars}}
      {{#isAdditionalPropertiesTrue}}
      for (key in names(self$additional_properties)) {
        {{classname}}Object[[key]] <- self$additional_properties[[key]]
      }

      {{/isAdditionalPropertiesTrue}}
      {{classname}}Object
    },
    #' Deserialize JSON string into an instance of {{{classname}}}
    #'
    #' @description
    #' Deserialize JSON string into an instance of {{{classname}}}
    #'
    #' @param input_json the JSON input
    #' @return the instance of {{{classname}}}
    #' @export
    fromJSON = function(input_json) {
      this_object <- jsonlite::fromJSON(input_json)
      {{#vars}}
      if (!is.null(this_object$`{{baseName}}`)) {
        {{#isContainer}}
        self$`{{name}}` <- ApiClient$new()$deserializeObj(this_object$`{{baseName}}`, "{{dataType}}", loadNamespace("{{packageName}}"))
        {{#isArray}}
        {{#uniqueItems}}
        if (!identical(self$`{{name}}`, unique(self$`{{name}}`))) {
          stop("Error! Items in `{{name}}` are not unique.")
        }
        {{/uniqueItems}}
        {{/isArray}}
        {{/isContainer}}
        {{^isContainer}}
        {{#isPrimitiveType}}
        {{#isEnumOrRef}}
        if (!is.null(this_object$`{{baseName}}`) && !(this_object$`{{baseName}}` %in% c({{#_enum}}"{{{.}}}"{{^-last}}, {{/-last}}{{/_enum}}))) {
          stop(paste("Error! \"", this_object$`{{baseName}}`, "\" cannot be assigned to `{{baseName}}`. Must be {{#_enum}}\"{{{.}}}\"{{^-last}}, {{/-last}}{{/_enum}}.", sep = ""))
        }
        {{/isEnumOrRef}}
        {{#isUri}}
        # to validate URL. ref: https://stackoverflow.com/questions/73952024/url-validation-in-r
        if (!stringr::str_detect(this_object$`{{baseName}}`, "(https?|ftp)://[^ /$.?#].[^\\s]*")) {
          stop(paste("Error! Invalid data for `{{baseName}}`. Must be a URL:", this_object$`{{baseName}}`))
        }
        {{/isUri}}
        self$`{{name}}` <- this_object$`{{baseName}}`
        {{/isPrimitiveType}}
        {{^isPrimitiveType}}
        `{{#lambda.lowercase}}{{{name}}}{{/lambda.lowercase}}_object` <- {{dataType}}$new()
        `{{#lambda.lowercase}}{{{name}}}{{/lambda.lowercase}}_object`$fromJSON(jsonlite::toJSON(this_object$`{{baseName}}`, auto_unbox = TRUE, digits = NA))
        self$`{{name}}` <- `{{#lambda.lowercase}}{{{name}}}{{/lambda.lowercase}}_object`
        {{/isPrimitiveType}}
        {{/isContainer}}
      }
      {{/vars}}
      {{#isAdditionalPropertiesTrue}}
      # process additional properties/fields in the payload
      for (key in names(this_object)) {
        if (!(key %in% self$`_field_list`)) { # json key not in list of fields
          self$additional_properties[[key]] <- this_object[[key]]
        }
      }

      {{/isAdditionalPropertiesTrue}}
      self
    },
    #' To JSON string
    #'
    #' @description
    #' To JSON String
    #'
    #' @return {{{classname}}} in JSON format
    #' @export
    toJSONString = function() {
      jsoncontent <- c(
      {{#vars}}
        if (!is.null(self$`{{name}}`)) {
          sprintf(
          '"{{baseName}}":
          {{#isContainer}}
          {{#isArray}}
          {{#isPrimitiveType}}
             {{#isNumeric}}[%d]{{/isNumeric}}{{^isNumeric}}[%s]{{/isNumeric}}
          {{/isPrimitiveType}}
          {{^isPrimitiveType}}[%s]
          {{/isPrimitiveType}}
          {{/isArray}}
          {{#isMap}}
          {{#isPrimitiveType}}
            {{#isNumeric}}%d{{/isNumeric}}{{^isNumeric}}{{^isBoolean}}"{{/isBoolean}}%s{{^isBoolean}}"{{/isBoolean}}{{/isNumeric}}
          {{/isPrimitiveType}}
          {{^isPrimitiveType}}%s
          {{/isPrimitiveType}}
          {{/isMap}}
          {{/isContainer}}
          {{^isContainer}}
          {{#isPrimitiveType}}
            {{#isNumeric}}%d{{/isNumeric}}{{^isNumeric}}{{^isBoolean}}"{{/isBoolean}}%s{{^isBoolean}}"{{/isBoolean}}{{/isNumeric}}
          {{/isPrimitiveType}}
          {{^isPrimitiveType}}%s
          {{/isPrimitiveType}}
          {{/isContainer}}',
          {{#isContainer}}
          {{#isArray}}
          {{#isPrimitiveType}}
          paste(unlist(lapply(self$`{{{name}}}`, function(x) paste0('"', x, '"'))), collapse = ",")
          {{/isPrimitiveType}}
          {{^isPrimitiveType}}
          paste(sapply(self$`{{{name}}}`, function(x) jsonlite::toJSON(x$toJSON(), auto_unbox = TRUE, digits = NA)), collapse = ",")
          {{/isPrimitiveType}}
          {{/isArray}}
          {{#isMap}}
          {{#isPrimitiveType}}
          jsonlite::toJSON(lapply(self$`{{{name}}}`, function(x){ x }), auto_unbox = TRUE, digits = NA)
          {{/isPrimitiveType}}
          {{^isPrimitiveType}}
          jsonlite::toJSON(lapply(self$`{{{name}}}`, function(x){ x$toJSON() }), auto_unbox = TRUE, digits = NA)
          {{/isPrimitiveType}}
          {{/isMap}}
          {{/isContainer}}
          {{^isContainer}}
          {{#isPrimitiveType}}
          {{#isBoolean}}tolower({{/isBoolean}}self$`{{name}}`{{#isBoolean}}){{/isBoolean}}
          {{/isPrimitiveType}}
          {{^isPrimitiveType}}
          jsonlite::toJSON(self$`{{name}}`$toJSON(), auto_unbox = TRUE, digits = NA)
          {{/isPrimitiveType}}
          {{/isContainer}}
          )
        }{{^-last}},{{/-last}}
      {{/vars}}
      )
      jsoncontent <- paste(jsoncontent, collapse = ",")
      json_string <- as.character(jsonlite::minify(paste("{", jsoncontent, "}", sep = "")))
      {{#isAdditionalPropertiesTrue}}
      json_obj <- jsonlite::fromJSON(json_string)
      for (key in names(self$additional_properties)) {
        json_obj[[key]] <- self$additional_properties[[key]]
      }
      json_string <- as.character(jsonlite::minify(jsonlite::toJSON(json_obj, auto_unbox = TRUE, digits = NA)))
      {{/isAdditionalPropertiesTrue}}
    },
    #' Deserialize JSON string into an instance of {{{classname}}}
    #'
    #' @description
    #' Deserialize JSON string into an instance of {{{classname}}}
    #'
    #' @param input_json the JSON input
    #' @return the instance of {{{classname}}}
    #' @export
    fromJSONString = function(input_json) {
      this_object <- jsonlite::fromJSON(input_json)
      {{#vars}}
      {{! AAPI - added condition for handling container type of parameters, map and array}}
      {{#isContainer}}
      self$`{{name}}` <- ApiClient$new()$deserializeObj(this_object$`{{name}}`, "{{dataType}}", loadNamespace("{{packageName}}"))
      {{#isArray}}
      {{#uniqueItems}}
      if (!identical(self$`{{name}}`, unique(self$`{{name}}`))) {
        stop("Error! Items in `{{name}}` are not unique.")
      }
      {{/uniqueItems}}
      {{/isArray}}
      {{/isContainer}}
      {{^isContainer}}
      {{#isPrimitiveType}}
      {{#isEnumOrRef}}
      if (!is.null(this_object$`{{baseName}}`) && !(this_object$`{{baseName}}` %in% c({{#_enum}}"{{{.}}}"{{^-last}}, {{/-last}}{{/_enum}}))) {
        stop(paste("Error! \"", this_object$`{{baseName}}`, "\" cannot be assigned to `{{baseName}}`. Must be {{#_enum}}\"{{{.}}}\"{{^-last}}, {{/-last}}{{/_enum}}.", sep = ""))
      }
      {{/isEnumOrRef}}
      {{#isUri}}
      # to validate URL. ref: https://stackoverflow.com/questions/73952024/url-validation-in-r
      if (!stringr::str_detect(this_object$`{{name}}`, "(https?|ftp)://[^ /$.?#].[^\\s]*")) {
        stop(paste("Error! Invalid data for `{{name}}`. Must be a URL:", this_object$`{{name}}`))
      }
      {{/isUri}}
      self$`{{name}}` <- this_object$`{{name}}`
      {{/isPrimitiveType}}
      {{^isPrimitiveType}}
      self$`{{name}}` <- {{dataType}}$new()$fromJSON(jsonlite::toJSON(this_object$`{{name}}`, auto_unbox = TRUE, digits = NA))
      {{/isPrimitiveType}}
      {{/isContainer}}
      {{/vars}}
      {{#isAdditionalPropertiesTrue}}
      # process additional properties/fields in the payload
      for (key in names(this_object)) {
        if (!(key %in% self$`_field_list`)) { # json key not in list of fields
          self$additional_properties[[key]] <- this_object[[key]]
        }
      }

      {{/isAdditionalPropertiesTrue}}
      self
    },
    #' Validate JSON input with respect to {{classname}}
    #'
    #' @description
    #' Validate JSON input with respect to {{classname}} and throw an exception if invalid
    #'
    #' @param input the JSON input
    #' @export
    validateJSON = function(input) {
      input_json <- jsonlite::fromJSON(input)
      {{#requiredVars}}
      # check the required field `{{name}}`
      if (!is.null(input_json$`{{name}}`)) {
        {{^isContainer}}
        {{#isInteger}}
        if (!(is.numeric(input_json$`{{name}}`) && length(input_json$`{{name}}`) == 1)) {
          stop(paste("Error! Invalid data for `{{name}}`. Must be an integer:", input_json$`{{name}}`))
        }
        {{/isInteger}}
        {{#isLong}}
        if (!(is.numeric(input_json$`{{name}}`) && length(input_json$`{{name}}`) == 1)) {
          stop(paste("Error! Invalid data for `{{name}}`. Must be an integer:", input_json$`{{name}}`))
        }
        {{/isLong}}
        {{#isFloat}}
        if (!(is.numeric(input_json$`{{name}}`) && length(input_json$`{{name}}`) == 1)) {
          stop(paste("Error! Invalid data for `{{name}}`. Must be a number:", input_json$`{{name}}`))
        }
        {{/isFloat}}
        {{#isDouble}}
        if (!(is.numeric(input_json$`{{name}}`) && length(input_json$`{{name}}`) == 1)) {
          stop(paste("Error! Invalid data for `{{name}}`. Must be a number:", input_json$`{{name}}`))
        }
        {{/isDouble}}
        {{#isString}}
        if (!(is.character(input_json$`{{name}}`) && length(input_json$`{{name}}`) == 1)) {
          stop(paste("Error! Invalid data for `{{name}}`. Must be a string:", input_json$`{{name}}`))
        }
        {{/isString}}
        {{#isBoolean}}
        if (!(is.logical(input_json$`{{name}}`) && length(input_json$`{{name}}`) == 1)) {
          stop(paste("Error! Invalid data for `{{name}}`. Must be a boolean:", input_json$`{{name}}`))
        }
        {{/isBoolean}}
        {{#isDate}}
        if (!(is.character(input_json$`{{name}}`) && length(input_json$`{{name}}`) == 1)) {
          stop(paste("Error! Invalid data for `{{name}}`. Must be a string:", input_json$`{{name}}`))
        }
        {{/isDate}}
        {{#isDateTime}}
        if (!(is.character(input_json$`{{name}}`) && length(input_json$`{{name}}`) == 1)) {
          stop(paste("Error! Invalid data for `{{name}}`. Must be a string:", input_json$`{{name}}`))
        }
        {{/isDateTime}}
        {{#isUri}}
        # to validate URL. ref: https://stackoverflow.com/questions/73952024/url-validation-in-r
        if (!stringr::str_detect(input_json$`{{name}}`, "(https?|ftp)://[^ /$.?#].[^\\s]*")) {
          stop(paste("Error! Invalid data for `{{name}}`. Must be a URL:", input_json$`{{name}}`))
        }
        {{/isUri}}
        {{^isPrimitiveType}}
        stopifnot(R6::is.R6(input_json$`{{name}}`))
        {{/isPrimitiveType}}
        {{/isContainer}}
        {{#isContainer}}
        stopifnot(is.vector(input_json$`{{name}}`), length(input_json$`{{name}}`) != 0)
        {{#isArray}}
        {{#uniqueItems}}
        if (!identical(input_json$`{{name}}`, unique(input_json$`{{name}}`))) {
          stop("Error! Items in `{{name}}` are not unique.")
        }
        {{/uniqueItems}}
        {{/isArray}}
        tmp <- sapply(input_json$`{{name}}`, function(x) stopifnot({{#isPrimitiveType}}is.character(x){{/isPrimitiveType}}{{^isPrimitiveType}}R6::is.R6(x){{/isPrimitiveType}}))
        {{/isContainer}}
      } else {
        stop(paste("The JSON input `", input, "` is invalid for {{classname}}: the required field `{{name}}` is missing."))
      }
      {{/requiredVars}}
    },
    #' To string (JSON format)
    #'
    #' @description
    #' To string (JSON format)
    #'
    #' @return String representation of {{{classname}}}
    #' @export
    toString = function() {
      self$toJSONString()
    },
    #' Return true if the values in all fields are valid.
    #'
    #' @description
    #' Return true if the values in all fields are valid.
    #'
    #' @return true if the values in all fields are valid.
    #' @export
    isValid = function() {
      {{#allVars}}
      {{^isNullable}}
      {{#required}}
      # check if the required `{{{name}}}` is null
      if (is.null(self$`{{{name}}}`)) {
        return(FALSE)
      }

      {{/required}}
      {{/isNullable}}
      {{#hasValidation}}
      {{#maxLength}}
      if (nchar(self$`{{{name}}}`) > {{maxLength}}) {
        return(FALSE)
      }
      {{/maxLength}}
      {{#minLength}}
      if (nchar(self$`{{{name}}}`) < {{minLength}}) {
        return(FALSE)
      }
      {{/minLength}}
      {{#maximum}}
      if (self$`{{{name}}}` >{{#exclusiveMaximum}}={{/exclusiveMaximum}} {{maximum}}) {
        return(FALSE)
      }
      {{/maximum}}
      {{#minimum}}
      if (self$`{{{name}}}` <{{#exclusiveMinimum}}={{/exclusiveMinimum}} {{minimum}}) {
        return(FALSE)
      }
      {{/minimum}}
      {{#pattern}}
      if (!str_detect(self$`{{{name}}}`, "{{{pattern}}}")) {
        return(FALSE)
      }
      {{/pattern}}
      {{#isUri}}
      # to validate URL. ref: https://stackoverflow.com/questions/73952024/url-validation-in-r
      if (!stringr::str_detect(self$`{{name}}`, "(https?|ftp)://[^ /$.?#].[^\\s]*")) {
        return(FALSE)
      }
      {{/isUri}}
      {{#maxItems}}
      if (length(self$`{{{name}}}`) > {{maxItems}}) {
        return(FALSE)
      }
      {{/maxItems}}
      {{#minItems}}
      if (length(self$`{{{name}}}`) < {{minItems}}) {
        return(FALSE)
      }
      {{/minItems}}

      {{/hasValidation}}
      {{/allVars}}
      TRUE
    },
    #' Return a list of invalid fields (if any).
    #'
    #' @description
    #' Return a list of invalid fields (if any).
    #'
    #' @return A list of invalid fields (if any).
    #' @export
    getInvalidFields = function() {
      invalid_fields <- list()
      {{#allVars}}
      {{^isNullable}}
      {{#required}}
      # check if the required `{{{name}}}` is null
      if (is.null(self$`{{{name}}}`)) {
        invalid_fields["{{{name}}}"] <- "Non-nullable required field `{{{name}}}` cannot be null."
      }

      {{/required}}
      {{/isNullable}}
      {{#hasValidation}}
      {{#maxLength}}
      if (nchar(self$`{{{name}}}`) > {{maxLength}}) {
        invalid_fields["{{{name}}}"] <- "Invalid length for `{{{name}}}`, must be smaller than or equal to {{maxLength}}."
      }
      {{/maxLength}}
      {{#minLength}}
      if (nchar(self$`{{{name}}}`) < {{minLength}}) {
        invalid_fields["{{{name}}}"] <- "Invalid length for `{{{name}}}`, must be bigger than or equal to {{minLength}}."
      }
      {{/minLength}}
      {{#maximum}}
      if (self$`{{{name}}}` >{{#exclusiveMaximum}}={{/exclusiveMaximum}} {{maximum}}) {
        invalid_fields["{{{name}}}"] <- "Invalid value for `{{{name}}}`, must be smaller than {{^exclusiveMaximum}}or equal to {{/exclusiveMaximum}}{{maximum}}."
      }
      {{/maximum}}
      {{#minimum}}
      if (self$`{{{name}}}` <{{#exclusiveMinimum}}={{/exclusiveMinimum}} {{minimum}}) {
        invalid_fields["{{{name}}}"] <- "Invalid value for `{{{name}}}`, must be bigger than {{^exclusiveMinimum}}or equal to {{/exclusiveMinimum}}{{minimum}}."
      }
      {{/minimum}}
      {{#pattern}}
      if (!str_detect(self$`{{{name}}}`, "{{{pattern}}}")) {
        invalid_fields["{{{name}}}"] <- "Invalid value for `{{{name}}}`, must conform to the pattern {{{pattern}}}."
      }
      {{/pattern}}
      {{#isUri}}
      # to validate URL. ref: https://stackoverflow.com/questions/73952024/url-validation-in-r
      if (!stringr::str_detect(self$`{{name}}`, "(https?|ftp)://[^ /$.?#].[^\\s]*")) {
        invalid_fields["{{{name}}}"] <- "Invalid value for `{{{name}}}`, must be URL."
      }
      {{/isUri}}
      {{#maxItems}}
      if (length(self$`{{{name}}}`) > {{maxItems}}) {
        invalid_fields["{{{name}}}"] <- "Invalid length for `{{{name}}}`, number of items must be less than or equal to {{maxItems}}."
      }
      {{/maxItems}}
      {{#minItems}}
      if (length(self$`{{{name}}}`) < {{minItems}}) {
        invalid_fields["{{{name}}}"] <- "Invalid length for `{{{param}}}`, number of items must be greater than or equal to {{minItems}}."
      }
      {{/minItems}}

      {{/hasValidation}}
      {{/allVars}}
      invalid_fields
    },
    #' Print the object
    #'
    #' @description
    #' Print the object
    #'
    #' @export
    print = function() {
      print(jsonlite::prettify(self$toJSONString()))
      invisible(self)
    }
  ),
  # Lock the class to prevent modifications to the method or field
  lock_class = TRUE
)
## Uncomment below to unlock the class to allow modifications of the method or field
# {{classname}}$unlock()
#
## Below is an example to define the print function
# {{classname}}$set("public", "print", function(...) {
#   print(jsonlite::prettify(self$toJSONString()))
#   invisible(self)
# })
## Uncomment below to lock the class to prevent modifications to the method or field
# {{classname}}$lock()




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