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kotlinlang

Very curious to know what techniques Kotliners use for managing resources. In the example below I manage a resource via the Closable technique:
```interface Closable {
  val isClosed: Boolean

  fun close()
}

class ResourceX : Closable {
  val isClosed: Boolean
    get() = _isClosed
  private var _isClosed = false

  fun close() {
    if (!_isClosed) {
      // Do cleanup here.
      _isClosed = true
    }
  }

  fun operation() {
    if (_isClosed) throw IllegalStateException("ResourceX is closed")
    // Do stuff related to the operation here.
  }
}```

<https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/use.html>
<https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.io/use.html>

Do note that the Kotlin Native Standard library doesn't have the `Closable` and `AutoClosable` interfaces.

<https://youtrack.jetbrains.com/issue/KT-31066>