44   LinkedListIterator(const LinkedListIterator<T>& that) : entry_(that.entry_) {}  in LinkedListIterator()  argument
47   LinkedListIterator<T>& operator=(const LinkedListIterator<T>& that) {
48     entry_ = that.entry_;
61   bool operator==(const LinkedListIterator<T>& that) const {
62     return entry_ == that.entry_;
65   bool operator!=(const LinkedListIterator<T>& that) const {
66     return entry_ != that.entry_;
87   LinkedList(LinkedList&& that) noexcept {  in LinkedList()  argument
88     this->head_ = that.head_;  in LinkedList()
89     this->tail_ = that.tail_;  in LinkedList()
90     that.head_ = that.tail_ = nullptr;  in LinkedList()