Context offers a means of passing arbitrary data (key-value pairs) to pipeline policies.Context object.Option with null-value.Context objects looking for one with the specified key.List of elements in the page.Header.Option.CancellationToken.cancel().true if this instance is initialized with a null-value or non-null-value, otherwise false.Option with the specified null-value or non-null-value.Runnable that will be called when this CancellationToken is canceled.Runnable that will be called when this CancellationToken is canceled.Option instance with no-value.Runnable that was registered using
CancellationToken.registerOnCancel(String, Runnable).