/**
  * Enqueue a message to the front of the queue for this state machine. Protected, may only be
  * called by instances of StateMachine.
  */
 protected final void sendMessageAtFrontOfQueue(Message msg) {
   mSmHandler.sendMessageAtFrontOfQueue(msg);
 }
 /**
  * Enqueue a message to the front of the queue for this state machine. Protected, may only be
  * called by instances of StateMachine.
  */
 protected final void sendMessageAtFrontOfQueue(int what) {
   mSmHandler.sendMessageAtFrontOfQueue(obtainMessage(what));
 }