CancellationToken 16.0.1 API

```
public final class CancellationToken

                    
```
Propagates notification that operations should be canceled.
Create an instance of CancellationTokenSource and pass the token returned from CancellationTokenSource.token to the asynchronous operation(s). Call CancellationTokenSource#cancel() to cancel the operations.
A CancellationToken can only be cancelled once - it should not be passed to future operations once cancelled.

Field Summary

Fields
Modifier and Type	Field	Description
`private final Boolean`	`isCancellationRequested`

Method Summary

Modifier and Type	Method	Description
`final Boolean`	`getIsCancellationRequested()`
`final CancellationTokenRegistration`	`register(Runnable action)`	Registers a runnable that will be called when this CancellationToken is canceled.
`final Unit`	`throwIfCancellationRequested()`
`String`	`toString()`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Method Detail
  - getIsCancellationRequested
```
 final Boolean getIsCancellationRequested()
```
  - register
```
 final CancellationTokenRegistration register(Runnable action)
```
    Registers a runnable that will be called when this CancellationToken is canceled. If this token is already in the canceled state, the runnable will be run immediately and synchronously.
    
    Parameters:
    
    action - the runnable to be run when the token is cancelled.
  - throwIfCancellationRequested
```
 final Unit throwIfCancellationRequested()
```
  - toString
```
 String toString()
```