org.openapitools.client.model.BillingDocumentItemCreateRequest Maven / Gradle / Ivy

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The SDK of JAVA language for Zuora pricing system
There is a newer version: 3.2.1
/*
* Quickstart API Reference
* Zuora Quickstart API is the API that helps you achieve fundamental use cases.
* It provides a much simplified object model and improved performance, enabling developers to easily learn and use.
*/

package org.openapitools.client.model;

import java.util.Objects;
import java.util.Arrays;
import com.google.gson.TypeAdapter;
import com.google.gson.annotations.JsonAdapter;
import com.google.gson.annotations.SerializedName;
import com.google.gson.stream.JsonReader;
import com.google.gson.stream.JsonWriter;
import io.swagger.annotations.ApiModel;
import io.swagger.annotations.ApiModelProperty;
import java.io.IOException;
import java.math.BigDecimal;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.openapitools.client.model.TaxationItemCreateRequest;
import org.threeten.bp.LocalDate;
import org.threeten.bp.OffsetDateTime;

import org.openapitools.client.JSON.CustomFieldAdapter;
import org.openapitools.client.JSON.NullableFieldAdapter;
/**
 * BillingDocumentItemCreateRequest
 */
@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
public class BillingDocumentItemCreateRequest {
  public static final String SERIALIZED_NAME_AMOUNT = "amount";
  @SerializedName(SERIALIZED_NAME_AMOUNT)
  private BigDecimal amount;

  public static final String SERIALIZED_NAME_DESCRIPTION = "description";
  @SerializedName(SERIALIZED_NAME_DESCRIPTION)
  private String description;

  public static final String SERIALIZED_NAME_DEFERRED_REVENUE_ACCOUNT = "deferred_revenue_account";
  @SerializedName(SERIALIZED_NAME_DEFERRED_REVENUE_ACCOUNT)
  private String deferredRevenueAccount;

  public static final String SERIALIZED_NAME_ON_ACCOUNT_ACCOUNT = "on_account_account";
  @SerializedName(SERIALIZED_NAME_ON_ACCOUNT_ACCOUNT)
  private String onAccountAccount;

  public static final String SERIALIZED_NAME_RECOGNIZED_REVENUE_ACCOUNT = "recognized_revenue_account";
  @SerializedName(SERIALIZED_NAME_RECOGNIZED_REVENUE_ACCOUNT)
  private String recognizedRevenueAccount;

  public static final String SERIALIZED_NAME_REVENUE_RECOGNITION_RULE_NAME = "revenue_recognition_rule_name";
  @SerializedName(SERIALIZED_NAME_REVENUE_RECOGNITION_RULE_NAME)
  private String revenueRecognitionRuleName;

  public static final String SERIALIZED_NAME_QUANTITY = "quantity";
  @SerializedName(SERIALIZED_NAME_QUANTITY)
  private BigDecimal quantity;

  public static final String SERIALIZED_NAME_SERVICE_END = "service_end";
  @SerializedName(SERIALIZED_NAME_SERVICE_END)
  private LocalDate serviceEnd;

  public static final String SERIALIZED_NAME_SERVICE_START = "service_start";
  @SerializedName(SERIALIZED_NAME_SERVICE_START)
  private LocalDate serviceStart;

  public static final String SERIALIZED_NAME_SKU = "sku";
  @SerializedName(SERIALIZED_NAME_SKU)
  private String sku;

  public static final String SERIALIZED_NAME_TAX_INCLUSIVE = "tax_inclusive";
  @SerializedName(SERIALIZED_NAME_TAX_INCLUSIVE)
  private Boolean taxInclusive;

  public static final String SERIALIZED_NAME_UNIT_OF_MEASURE = "unit_of_measure";
  @SerializedName(SERIALIZED_NAME_UNIT_OF_MEASURE)
  private String unitOfMeasure;

  public static final String SERIALIZED_NAME_TAXATION_ITEMS = "taxation_items";
  @SerializedName(SERIALIZED_NAME_TAXATION_ITEMS)
  private List taxationItems = null;

  public static final String SERIALIZED_NAME_UNIT_AMOUNT = "unit_amount";
  @SerializedName(SERIALIZED_NAME_UNIT_AMOUNT)
  private BigDecimal unitAmount;

  public static final String SERIALIZED_NAME_BOOKING_REFERENCE = "booking_reference";
  @SerializedName(SERIALIZED_NAME_BOOKING_REFERENCE)
  private String bookingReference;

  public static final String SERIALIZED_NAME_PRICE_ID = "price_id";
  @SerializedName(SERIALIZED_NAME_PRICE_ID)
  private String priceId;

  public static final String SERIALIZED_NAME_PURCHASE_ORDER_NUMBER = "purchase_order_number";
  @SerializedName(SERIALIZED_NAME_PURCHASE_ORDER_NUMBER)
  private String purchaseOrderNumber;

  public static final String SERIALIZED_NAME_TAX_CODE = "tax_code";
  @SerializedName(SERIALIZED_NAME_TAX_CODE)
  private String taxCode;

  public static final String SERIALIZED_NAME_DOCUMENT_ITEM_DATE = "document_item_date";
  @SerializedName(SERIALIZED_NAME_DOCUMENT_ITEM_DATE)
  private OffsetDateTime documentItemDate;

  public static final String SERIALIZED_NAME_NAME = "name";
  @SerializedName(SERIALIZED_NAME_NAME)
  private String name;

  public static final String SERIALIZED_NAME_INVOICE_ITEM_ID = "invoice_item_id";
  @SerializedName(SERIALIZED_NAME_INVOICE_ITEM_ID)
  private String invoiceItemId;

  public static final String SERIALIZED_NAME_ACCOUNTING_CODE = "accounting_code";
  @SerializedName(SERIALIZED_NAME_ACCOUNTING_CODE)
  private String accountingCode;

  public static final String SERIALIZED_NAME_CUSTOM_FIELDS = "custom_fields";
  @SerializedName(SERIALIZED_NAME_CUSTOM_FIELDS)
  @JsonAdapter(CustomFieldAdapter.class)
  private Map customFields = null;

  public BillingDocumentItemCreateRequest() { 
  }

  public BillingDocumentItemCreateRequest amount(BigDecimal amount) {
    
    this.amount = amount;
    return this;
  }

   /**
   * Amount (in the currency specified) of the invoice item. This should always be equal to unit_amount * quantity.
   * @return amount
  **/
  @javax.annotation.Nullable
  @ApiModelProperty(value = "Amount (in the currency specified) of the invoice item. This should always be equal to unit_amount * quantity.")

  public BigDecimal getAmount() {
    return amount;
  }


  public void setAmount(BigDecimal amount) {
    this.amount = amount;
  }


  public BillingDocumentItemCreateRequest description(String description) {
    
    this.description = description;
    return this;
  }

   /**
   * An arbitrary string associated with the object. Often useful for displaying to users.
   * @return description
  **/
  @javax.annotation.Nullable
  @ApiModelProperty(value = "An arbitrary string associated with the object. Often useful for displaying to users.")

  public String getDescription() {
    return description;
  }


  public void setDescription(String description) {
    this.description = description;
  }


  public BillingDocumentItemCreateRequest deferredRevenueAccount(String deferredRevenueAccount) {
    
    this.deferredRevenueAccount = deferredRevenueAccount;
    return this;
  }

   /**
   * An active account in your Zuora Chart of Accounts.
   * @return deferredRevenueAccount
  **/
  @javax.annotation.Nullable
  @ApiModelProperty(value = "An active account in your Zuora Chart of Accounts.")

  public String getDeferredRevenueAccount() {
    return deferredRevenueAccount;
  }


  public void setDeferredRevenueAccount(String deferredRevenueAccount) {
    this.deferredRevenueAccount = deferredRevenueAccount;
  }


  public BillingDocumentItemCreateRequest onAccountAccount(String onAccountAccount) {
    
    this.onAccountAccount = onAccountAccount;
    return this;
  }

   /**
   * An active account in your Zuora Chart of Accounts.
   * @return onAccountAccount
  **/
  @javax.annotation.Nullable
  @ApiModelProperty(value = "An active account in your Zuora Chart of Accounts.")

  public String getOnAccountAccount() {
    return onAccountAccount;
  }


  public void setOnAccountAccount(String onAccountAccount) {
    this.onAccountAccount = onAccountAccount;
  }


  public BillingDocumentItemCreateRequest recognizedRevenueAccount(String recognizedRevenueAccount) {
    
    this.recognizedRevenueAccount = recognizedRevenueAccount;
    return this;
  }

   /**
   * An active account in your Zuora Chart of Accounts.
   * @return recognizedRevenueAccount
  **/
  @javax.annotation.Nullable
  @ApiModelProperty(value = "An active account in your Zuora Chart of Accounts.")

  public String getRecognizedRevenueAccount() {
    return recognizedRevenueAccount;
  }


  public void setRecognizedRevenueAccount(String recognizedRevenueAccount) {
    this.recognizedRevenueAccount = recognizedRevenueAccount;
  }


  public BillingDocumentItemCreateRequest revenueRecognitionRuleName(String revenueRecognitionRuleName) {
    
    this.revenueRecognitionRuleName = revenueRecognitionRuleName;
    return this;
  }

   /**
   * The name of the revenue recognition rule governing the revenue schedule.
   * @return revenueRecognitionRuleName
  **/
  @javax.annotation.Nullable
  @ApiModelProperty(value = "The name of the revenue recognition rule governing the revenue schedule.")

  public String getRevenueRecognitionRuleName() {
    return revenueRecognitionRuleName;
  }


  public void setRevenueRecognitionRuleName(String revenueRecognitionRuleName) {
    this.revenueRecognitionRuleName = revenueRecognitionRuleName;
  }


  public BillingDocumentItemCreateRequest quantity(BigDecimal quantity) {
    
    this.quantity = quantity;
    return this;
  }

   /**
   * The number of units of this item.
   * @return quantity
  **/
  @javax.annotation.Nullable
  @ApiModelProperty(value = "The number of units of this item.")

  public BigDecimal getQuantity() {
    return quantity;
  }


  public void setQuantity(BigDecimal quantity) {
    this.quantity = quantity;
  }


  public BillingDocumentItemCreateRequest serviceEnd(LocalDate serviceEnd) {
    
    this.serviceEnd = serviceEnd;
    return this;
  }

   /**
   * The end date of the service period associated with this billing document item. If the price for the associated subscription item is a one-time fee, then this date is the date of that subscription item.
   * @return serviceEnd
  **/
  @javax.annotation.Nullable
  @ApiModelProperty(example = "Sat Jan 01 00:00:00 GMT 2022", value = "The end date of the service period associated with this billing document item. If the price for the associated subscription item is a one-time fee, then this date is the date of that subscription item.")

  public LocalDate getServiceEnd() {
    return serviceEnd;
  }


  public void setServiceEnd(LocalDate serviceEnd) {
    this.serviceEnd = serviceEnd;
  }


  public BillingDocumentItemCreateRequest serviceStart(LocalDate serviceStart) {
    
    this.serviceStart = serviceStart;
    return this;
  }

   /**
   * The start date of the service period associated with this billing document item. If the price for the associated subscription item is a one-time fee, then this date is the date of that subscription item.
   * @return serviceStart
  **/
  @javax.annotation.Nonnull
  @ApiModelProperty(example = "Sat Jan 01 00:00:00 GMT 2022", required = true, value = "The start date of the service period associated with this billing document item. If the price for the associated subscription item is a one-time fee, then this date is the date of that subscription item.")

  public LocalDate getServiceStart() {
    return serviceStart;
  }


  public void setServiceStart(LocalDate serviceStart) {
    this.serviceStart = serviceStart;
  }


  public BillingDocumentItemCreateRequest sku(String sku) {
    
    this.sku = sku;
    return this;
  }

   /**
   * The unique SKU (stock keeping unit) of the product associated with this item.
   * @return sku
  **/
  @javax.annotation.Nullable
  @ApiModelProperty(value = "The unique SKU (stock keeping unit) of the product associated with this item.")

  public String getSku() {
    return sku;
  }


  public void setSku(String sku) {
    this.sku = sku;
  }


  public BillingDocumentItemCreateRequest taxInclusive(Boolean taxInclusive) {
    
    this.taxInclusive = taxInclusive;
    return this;
  }

   /**
   * Indicates whether the billing document item amount is inclusive or exclusive of tax.
   * @return taxInclusive
  **/
  @javax.annotation.Nullable
  @ApiModelProperty(value = "Indicates whether the billing document item amount is inclusive or exclusive of tax.")

  public Boolean getTaxInclusive() {
    return taxInclusive;
  }


  public void setTaxInclusive(Boolean taxInclusive) {
    this.taxInclusive = taxInclusive;
  }


  public BillingDocumentItemCreateRequest unitOfMeasure(String unitOfMeasure) {
    
    this.unitOfMeasure = unitOfMeasure;
    return this;
  }

   /**
   * Specifies the units used to measure usage.
   * @return unitOfMeasure
  **/
  @javax.annotation.Nullable
  @ApiModelProperty(value = "Specifies the units used to measure usage.")

  public String getUnitOfMeasure() {
    return unitOfMeasure;
  }


  public void setUnitOfMeasure(String unitOfMeasure) {
    this.unitOfMeasure = unitOfMeasure;
  }


  public BillingDocumentItemCreateRequest taxationItems(List taxationItems) {
    
    this.taxationItems = taxationItems;
    return this;
  }

  public BillingDocumentItemCreateRequest addTaxationItemsItem(TaxationItemCreateRequest taxationItemsItem) {
    if (this.taxationItems == null) {
      this.taxationItems = new ArrayList();
    }
    this.taxationItems.add(taxationItemsItem);
    return this;
  }

   /**
   * List of taxation items.
   * @return taxationItems
  **/
  @javax.annotation.Nullable
  @ApiModelProperty(value = "List of taxation items.")

  public List getTaxationItems() {
    return taxationItems;
  }


  public void setTaxationItems(List taxationItems) {
    this.taxationItems = taxationItems;
  }


  public BillingDocumentItemCreateRequest unitAmount(BigDecimal unitAmount) {
    
    this.unitAmount = unitAmount;
    return this;
  }

   /**
   * Unit amount (in the currency specified) of the billing document item.
   * @return unitAmount
  **/
  @javax.annotation.Nullable
  @ApiModelProperty(value = "Unit amount (in the currency specified) of the billing document item.")

  public BigDecimal getUnitAmount() {
    return unitAmount;
  }


  public void setUnitAmount(BigDecimal unitAmount) {
    this.unitAmount = unitAmount;
  }


  public BillingDocumentItemCreateRequest bookingReference(String bookingReference) {
    
    this.bookingReference = bookingReference;
    return this;
  }

   /**
   * The booking reference for this billing document item.
   * @return bookingReference
  **/
  @javax.annotation.Nullable
  @ApiModelProperty(value = "The booking reference for this billing document item.")

  public String getBookingReference() {
    return bookingReference;
  }


  public void setBookingReference(String bookingReference) {
    this.bookingReference = bookingReference;
  }


  public BillingDocumentItemCreateRequest priceId(String priceId) {
    
    this.priceId = priceId;
    return this;
  }

   /**
   * The identifier of the price this billing document item is associated with.
   * @return priceId
  **/
  @javax.annotation.Nullable
  @ApiModelProperty(value = "The identifier of the price this billing document item is associated with.")

  public String getPriceId() {
    return priceId;
  }


  public void setPriceId(String priceId) {
    this.priceId = priceId;
  }


  public BillingDocumentItemCreateRequest purchaseOrderNumber(String purchaseOrderNumber) {
    
    this.purchaseOrderNumber = purchaseOrderNumber;
    return this;
  }

   /**
   * The purchase order number associated with this billing document item.
   * @return purchaseOrderNumber
  **/
  @javax.annotation.Nullable
  @ApiModelProperty(value = "The purchase order number associated with this billing document item.")

  public String getPurchaseOrderNumber() {
    return purchaseOrderNumber;
  }


  public void setPurchaseOrderNumber(String purchaseOrderNumber) {
    this.purchaseOrderNumber = purchaseOrderNumber;
  }


  public BillingDocumentItemCreateRequest taxCode(String taxCode) {
    
    this.taxCode = taxCode;
    return this;
  }

   /**
   * The designated tax code.
   * @return taxCode
  **/
  @javax.annotation.Nullable
  @ApiModelProperty(value = "The designated tax code.")

  public String getTaxCode() {
    return taxCode;
  }


  public void setTaxCode(String taxCode) {
    this.taxCode = taxCode;
  }


  public BillingDocumentItemCreateRequest documentItemDate(OffsetDateTime documentItemDate) {
    
    this.documentItemDate = documentItemDate;
    return this;
  }

   /**
   * The date when the billing document item takes effect. This field is applicable only if the `type` field is set to `invoice`.
   * @return documentItemDate
  **/
  @javax.annotation.Nullable
  @ApiModelProperty(example = "2022-01-01T07:08:12-07:00", value = "The date when the billing document item takes effect. This field is applicable only if the `type` field is set to `invoice`.")

  public OffsetDateTime getDocumentItemDate() {
    return documentItemDate;
  }


  public void setDocumentItemDate(OffsetDateTime documentItemDate) {
    this.documentItemDate = documentItemDate;
  }


  public BillingDocumentItemCreateRequest name(String name) {
    
    this.name = name;
    return this;
  }

   /**
   * Name of the billing document item displayed to customers on the billing document.
   * @return name
  **/
  @javax.annotation.Nullable
  @ApiModelProperty(value = "Name of the billing document item displayed to customers on the billing document.")

  public String getName() {
    return name;
  }


  public void setName(String name) {
    this.name = name;
  }


  public BillingDocumentItemCreateRequest invoiceItemId(String invoiceItemId) {
    
    this.invoiceItemId = invoiceItemId;
    return this;
  }

   /**
   * The identifier of the invoice item associated with this billing document item.
   * @return invoiceItemId
  **/
  @javax.annotation.Nullable
  @ApiModelProperty(value = "The identifier of the invoice item associated with this billing document item.")

  public String getInvoiceItemId() {
    return invoiceItemId;
  }


  public void setInvoiceItemId(String invoiceItemId) {
    this.invoiceItemId = invoiceItemId;
  }


  public BillingDocumentItemCreateRequest accountingCode(String accountingCode) {
    
    this.accountingCode = accountingCode;
    return this;
  }

   /**
   * Get accountingCode
   * @return accountingCode
  **/
  @javax.annotation.Nullable
  @ApiModelProperty(value = "")

  public String getAccountingCode() {
    return accountingCode;
  }


  public void setAccountingCode(String accountingCode) {
    this.accountingCode = accountingCode;
  }


  public BillingDocumentItemCreateRequest customFields(Map customFields) {
    
    this.customFields = customFields;
    return this;
  }

  public BillingDocumentItemCreateRequest putCustomFieldsItem(String key, String customFieldsItem) {
    if (this.customFields == null) {
      this.customFields = new HashMap();
    }
    this.customFields.put(key, customFieldsItem);
    return this;
  }

   /**
   * Set of user-defined fields associated with this object. Useful for storing additional information about the object in a structured format.
   * @return customFields
  **/
  @javax.annotation.Nullable
  @ApiModelProperty(value = "Set of user-defined fields associated with this object. Useful for storing additional information about the object in a structured format.")

  public Map getCustomFields() {
    return customFields;
  }


  public void setCustomFields(Map customFields) {
    this.customFields = customFields;
  }


  @Override
  public boolean equals(Object o) {
    if (this == o) {
      return true;
    }
    if (o == null || getClass() != o.getClass()) {
      return false;
    }
    BillingDocumentItemCreateRequest billingDocumentItemCreateRequest = (BillingDocumentItemCreateRequest) o;
    return Objects.equals(this.amount, billingDocumentItemCreateRequest.amount) &&
        Objects.equals(this.description, billingDocumentItemCreateRequest.description) &&
        Objects.equals(this.deferredRevenueAccount, billingDocumentItemCreateRequest.deferredRevenueAccount) &&
        Objects.equals(this.onAccountAccount, billingDocumentItemCreateRequest.onAccountAccount) &&
        Objects.equals(this.recognizedRevenueAccount, billingDocumentItemCreateRequest.recognizedRevenueAccount) &&
        Objects.equals(this.revenueRecognitionRuleName, billingDocumentItemCreateRequest.revenueRecognitionRuleName) &&
        Objects.equals(this.quantity, billingDocumentItemCreateRequest.quantity) &&
        Objects.equals(this.serviceEnd, billingDocumentItemCreateRequest.serviceEnd) &&
        Objects.equals(this.serviceStart, billingDocumentItemCreateRequest.serviceStart) &&
        Objects.equals(this.sku, billingDocumentItemCreateRequest.sku) &&
        Objects.equals(this.taxInclusive, billingDocumentItemCreateRequest.taxInclusive) &&
        Objects.equals(this.unitOfMeasure, billingDocumentItemCreateRequest.unitOfMeasure) &&
        Objects.equals(this.taxationItems, billingDocumentItemCreateRequest.taxationItems) &&
        Objects.equals(this.unitAmount, billingDocumentItemCreateRequest.unitAmount) &&
        Objects.equals(this.bookingReference, billingDocumentItemCreateRequest.bookingReference) &&
        Objects.equals(this.priceId, billingDocumentItemCreateRequest.priceId) &&
        Objects.equals(this.purchaseOrderNumber, billingDocumentItemCreateRequest.purchaseOrderNumber) &&
        Objects.equals(this.taxCode, billingDocumentItemCreateRequest.taxCode) &&
        Objects.equals(this.documentItemDate, billingDocumentItemCreateRequest.documentItemDate) &&
        Objects.equals(this.name, billingDocumentItemCreateRequest.name) &&
        Objects.equals(this.invoiceItemId, billingDocumentItemCreateRequest.invoiceItemId) &&
        Objects.equals(this.accountingCode, billingDocumentItemCreateRequest.accountingCode) &&
        Objects.equals(this.customFields, billingDocumentItemCreateRequest.customFields);
  }

  @Override
  public int hashCode() {
    return Objects.hash(amount, description, deferredRevenueAccount, onAccountAccount, recognizedRevenueAccount, revenueRecognitionRuleName, quantity, serviceEnd, serviceStart, sku, taxInclusive, unitOfMeasure, taxationItems, unitAmount, bookingReference, priceId, purchaseOrderNumber, taxCode, documentItemDate, name, invoiceItemId, accountingCode, customFields);
  }

  @Override
  public String toString() {
    StringBuilder sb = new StringBuilder();
    sb.append("class BillingDocumentItemCreateRequest {\n");
    sb.append("    amount: ").append(toIndentedString(amount)).append("\n");
    sb.append("    description: ").append(toIndentedString(description)).append("\n");
    sb.append("    deferredRevenueAccount: ").append(toIndentedString(deferredRevenueAccount)).append("\n");
    sb.append("    onAccountAccount: ").append(toIndentedString(onAccountAccount)).append("\n");
    sb.append("    recognizedRevenueAccount: ").append(toIndentedString(recognizedRevenueAccount)).append("\n");
    sb.append("    revenueRecognitionRuleName: ").append(toIndentedString(revenueRecognitionRuleName)).append("\n");
    sb.append("    quantity: ").append(toIndentedString(quantity)).append("\n");
    sb.append("    serviceEnd: ").append(toIndentedString(serviceEnd)).append("\n");
    sb.append("    serviceStart: ").append(toIndentedString(serviceStart)).append("\n");
    sb.append("    sku: ").append(toIndentedString(sku)).append("\n");
    sb.append("    taxInclusive: ").append(toIndentedString(taxInclusive)).append("\n");
    sb.append("    unitOfMeasure: ").append(toIndentedString(unitOfMeasure)).append("\n");
    sb.append("    taxationItems: ").append(toIndentedString(taxationItems)).append("\n");
    sb.append("    unitAmount: ").append(toIndentedString(unitAmount)).append("\n");
    sb.append("    bookingReference: ").append(toIndentedString(bookingReference)).append("\n");
    sb.append("    priceId: ").append(toIndentedString(priceId)).append("\n");
    sb.append("    purchaseOrderNumber: ").append(toIndentedString(purchaseOrderNumber)).append("\n");
    sb.append("    taxCode: ").append(toIndentedString(taxCode)).append("\n");
    sb.append("    documentItemDate: ").append(toIndentedString(documentItemDate)).append("\n");
    sb.append("    name: ").append(toIndentedString(name)).append("\n");
    sb.append("    invoiceItemId: ").append(toIndentedString(invoiceItemId)).append("\n");
    sb.append("    accountingCode: ").append(toIndentedString(accountingCode)).append("\n");
    sb.append("    customFields: ").append(toIndentedString(customFields)).append("\n");
    sb.append("}");
    return sb.toString();
  }

  /**
   * Convert the given object to string with each line indented by 4 spaces
   * (except the first line).
   */
  private String toIndentedString(Object o) {
    if (o == null) {
      return "null";
    }
    return o.toString().replace("\n", "\n    ");
  }

}