Method cancel

output/java_guava/1.4.17/Futures.java:670–673

(boolean mayInterruptIfRunning)

    checkNotNull(function);
    return new Future<O>() {
      @Override
      public boolean cancel(boolean mayInterruptIfRunning) {
        return input.cancel(mayInterruptIfRunning);
      }

      @Override
      public boolean isCancelled() {