StreamTaskCancellationContext (Flink : 2.0-SNAPSHOT API)

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.
```
@FunctionalInterface
@Internal
public interface StreamTaskCancellationContext
```
Context on the StreamTask for figuring out whether it has been cancelled.

Method Summary

All Methods Static Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`static StreamTaskCancellationContext`	`alwaysRunning()`	Factory for a context that always returns `false` when `isCancelled()` is called.
`boolean`	`isCancelled()`	Find out whether the `StreamTask` this context belongs to has been cancelled.

- Method Detail
  - alwaysRunning
```
static StreamTaskCancellationContext alwaysRunning()
```
    Factory for a context that always returns false when isCancelled() is called.
    
    Returns:
    
    context
  - isCancelled
```
boolean isCancelled()
```
    Find out whether the StreamTask this context belongs to has been cancelled.
    
    Returns:
    
    true if the StreamTask the has been cancelled