cancel
Cancels the loading or manages the unloading of a specified ColorBufferProxy instance.
If the proxy is in the load queue, it is removed. If the proxy's state is LOADED, it is added to the unload queue for further processing.
Parameters
proxy
the ColorBufferProxy instance to be canceled. If it is queued for loading, it will be removed from the load queue. If it is loaded, it will be scheduled for unloading.