718 RopePieceBTree::RopePieceBTree() { Root = new RopePieceBTreeLeaf(); }  in RopePieceBTree()
722   Root = new RopePieceBTreeLeaf();  in RopePieceBTree()
725 RopePieceBTree::~RopePieceBTree() { getRoot(Root)->Destroy(); }  in ~RopePieceBTree()
727 unsigned RopePieceBTree::size() const { return getRoot(Root)->size(); }  in size()
730   if (auto *Leaf = dyn_cast<RopePieceBTreeLeaf>(getRoot(Root)))  in clear()
733     getRoot(Root)->Destroy();  in clear()
734     Root = new RopePieceBTreeLeaf();  in clear()
740   if (RopePieceBTreeNode *RHS = getRoot(Root)->split(Offset))  in insert()
741     Root = new RopePieceBTreeInterior(getRoot(Root), RHS);  in insert()
744   if (RopePieceBTreeNode *RHS = getRoot(Root)->insert(Offset, R))  in insert()
745     Root = new RopePieceBTreeInterior(getRoot(Root), RHS);  in insert()
750   if (RopePieceBTreeNode *RHS = getRoot(Root)->split(Offset))  in erase()
751     Root = new RopePieceBTreeInterior(getRoot(Root), RHS);  in erase()
754   getRoot(Root)->erase(Offset, NumBytes);  in erase()