Cancellable

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.
```
@FunctionalInterface
public interface Cancellable
```
A functional interface that has a single cancel method that can throw.

- Method Summary
  
  All Methods Instance Methods Abstract Methods
  Modifier and Type Method Description
  
  void cancel()
  Cancel the action or free a resource.

- Method Detail
  - cancel
```
void cancel()
     throws java.lang.Throwable
```
    Cancel the action or free a resource.
    
    Throws:
    
    java.lang.Throwable - if the implementation wishes to throw any type of exception