Cancel the operation. Beware! This will not necessarily cancel the
* execution of the operation on the server side. However it will make
* sure that the callback associated with this operation will not be
* called anymore, effectively disabling the operation from the client
* side's view.
Cancel the operation. Beware! This will not necessarily cancel the * execution of the operation on the server side. However it will make * sure that the callback associated with this operation will not be * called anymore, effectively disabling the operation from the client * side's view.