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Coroutines support libraries for Kotlin
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package kotlinx.coroutines
/**
* A [Runnable] that's especially optimized for running in [Dispatchers.Default] on the JVM.
*
* Replacing a [SchedulerTask] with a [Runnable] should not lead to any change in observable behavior.
*
* An arbitrary [Runnable], once it is dispatched by [Dispatchers.Default], gets wrapped into a class that
* stores the submission time, the execution context, etc.
* For [Runnable] instances that we know are only going to be executed in dispatch procedures, we can avoid the
* overhead of separately allocating a wrapper, and instead have the [Runnable] contain the required fields
* on construction.
*
* When running outside the standard dispatchers, these new fields are just dead weight.
*/
internal expect abstract class SchedulerTask internal constructor() : Runnable