prev_used_        303 src/global-handles.cc       prev_used_ = NULL;
prev_used_        305 src/global-handles.cc       old_first->prev_used_ = this;
prev_used_        312 src/global-handles.cc       if (next_used_ != NULL) next_used_->prev_used_ = prev_used_;
prev_used_        313 src/global-handles.cc       if (prev_used_ != NULL) prev_used_->next_used_ = next_used_;
prev_used_        325 src/global-handles.cc   NodeBlock* prev_used() const { return prev_used_; }
prev_used_        332 src/global-handles.cc   NodeBlock* prev_used_;