86   bool Empty() const { return Empty_(); }  in Empty()  function
121   bool Empty() const { return front_ == kNoStateId; }  in Empty()  function
133   virtual bool Empty_() const { return Empty(); }  in Empty_()
157   bool Empty() const { return empty(); }  in Empty()  function
168   virtual bool Empty_() const { return Empty(); }  in Empty_()
190   bool Empty() const { return empty(); }  in Empty()  function
201   virtual bool Empty_() const { return Empty(); }  in Empty_()
249   bool Empty() const { return heap_.Empty(); }  in Empty()  function
267   virtual bool Empty_() const { return Empty(); }  in Empty_()
356   bool Empty() const { return front_ > back_; }  in Empty()  function
377   virtual bool Empty_() const { return Empty(); }  in Empty_()
409   bool Empty() const { return front_ > back_; }  in Empty()  function
429   virtual bool Empty_() const { return Empty(); }  in Empty_()
453            (((*queue_)[front_] && (*queue_)[front_]->Empty())  in Head()
489   bool Empty() const {  in Empty()  function
495       return (*queue_)[front_]->Empty();  in Empty()
525   virtual bool Empty_() const { return Empty(); }  in Empty_()
642   bool Empty() const { return queue_->Empty(); }  in Empty()  function
670   virtual bool Empty_() const { return Empty(); }  in Empty_()
843   bool Empty() const { return queue_->Empty(); }  in Empty()  function
854   virtual bool Empty_() const { return Empty(); }  in Empty_()
916   bool Empty() const { return queue_->Empty(); }  in Empty()  function
927   virtual bool Empty_() const { return Empty(); }  in Empty_()