354   Node* from() const { return use_->from(); }  in from()
357     int const index = use_->input_index();  in index()
358     DCHECK_LT(index, use_->from()->InputCount());  in index()
368       if (old_to) old_to->RemoveUse(use_);  in UpdateTo()
370       if (new_to) new_to->AppendUse(use_);  in UpdateTo()
378   Edge(Node::Use* use, Node** input_ptr) : use_(use), input_ptr_(input_ptr) {  in Edge()
384   Node::Use* use_;  variable
398   iterator() : use_(nullptr), input_ptr_(nullptr) {}  in iterator()
400       : use_(other.use_), input_ptr_(other.input_ptr_) {}  in iterator()
402   Edge operator*() const { return Edge(use_, input_ptr_); }
409     use_--;
418       : use_(from->GetUsePtr(index)), input_ptr_(from->GetInputPtr(index)) {}
420   Use* use_;  variable