30         Item *next {nullptr};
65         item->next = nullptr;  in Append()
72             tail_->next = item;  in Append()
89         item->next = nullptr;  in Prepend()
97             item->next = head_;  in Prepend()
117         auto afterNext = after->next;  in Insert()
119         after->next = item;  in Insert()
122         item->next = afterNext;  in Insert()
142             head_ = head_->next;  in Erase()
149                 tail_->next = nullptr;  in Erase()
154             auto next = item->next;  in Erase()  local
156             ES2PANDA_ASSERT(prev != nullptr && next != nullptr);  in Erase()
157             prev->next = next;  in Erase()
158             next->prev = prev;  in Erase()
161         item->next = nullptr;  in Erase()