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/*
 * Copyright (C) 2018-2019 Lightbend Inc. 
 */

package akka.util

import com.github.ghik.silencer.silent

import akka.annotation.InternalApi

/**
 * Marker for explicit or implicit parameter known to be unused, yet
 * still necessary from a binary compatibility perspective
 * or other reason. Useful in combination with
 * `-Ywarn-unused:explicits,implicits` compiler options.
 *
 * Extends 'deprecated' to make sure using a parameter marked @unused
 * produces a warning, and not using a parameter marked @unused does not
 * produce an 'unused parameter' warning.
 *
 * This approach is deprecated in Scala 2.13 and scheduled to be
 * removed in 2.14. Perhaps we should promote introducing an `@unused`
 * to Scala? https://contributors.scala-lang.org/t/more-error-reporting-annotations/1681/7
 *
 * INTERNAL API
 */
@silent("deprecated")
@InternalApi private[akka] class unused extends deprecated("unused", "")




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