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<?php
namespace React\Promise;
interface CancellablePromiseInterface extends PromiseInterface
{
/**
* The `cancel()` method notifies the creator of the promise that there is no
* further interest in the results of the operation.
*
* Once a promise is settled (either fulfilled or rejected), calling `cancel()` on
* a promise has no effect.
*
* @return void
*/
public function cancel();
}