intellij-plugin/educational-core/src/com/jetbrains/edu/learning/framework/impl/UserChanges.kt [223:233]:
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    fun writeChange(change: Change, out: DataOutput) {
      val ordinal = when (change) {
        is AddFile -> 0
        is RemoveFile -> 1
        is ChangeFile -> 2
        is PropagateLearnerCreatedTaskFile -> 3
        is RemoveTaskFile -> 4
      }
      out.writeInt(ordinal)
      change.write(out)
    }
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intellij-plugin/educational-core/src/com/jetbrains/edu/coursecreator/framework/CCUserChanges.kt [249:259]:
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    fun writeChange(change: CCChange, out: DataOutput) {
      val ordinal = when (change) {
        is AddFile -> 0
        is RemoveFile -> 1
        is ChangeFile -> 2
        is PropagateLearnerCreatedTaskFile -> 3
        is RemoveTaskFile -> 4
      }
      out.writeInt(ordinal)
      change.write(out)
    }
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