Private consumersIndicates whether cancellation has occurred.
Add a cancellation handler function. The handler will be invoked synchronously if this.isCanceled === true. Otherwise, it will be invoked synchronously upon cancellation, unless it is removed prior to cancellation.
The handler function must not throw any exceptions when called.
The handler function must not already be registered.
A function that unregisters the handler.
The handler function to add.
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Creates a CancellationToken corresponding to an asynchronous process with multiple consumers. It is cancelled only when the cancellation tokens corresponding to all of the consumers have been cancelled.