/**
* Conditionally quit the looper and stop execution.
*
* <p>This sends the SM_QUIT_MSG to the state machine and if not handled by any state's
* processMessage then the state machine will be stopped and no further messages will be
* processed.
*/
public final void quit() {
// mSmHandler can be null if the state machine has quit.
if (mSmHandler == null) return;
mSmHandler.quit();
}
