itree_node_begin 1005 src/buffer.c             ptrdiff_t begin = itree_node_begin (tree, node);
itree_node_begin 1393 src/buffer.h     return itree_node_begin (ov->buffer->overlays, ov->interval);
itree_node_begin  111 src/itree.h    extern ptrdiff_t itree_node_begin (struct itree_tree *, struct itree_node *);
itree_node_begin  977 test/manual/noverlay/itree-tests.c #define N_BEG (itree_node_begin (&gap_tree, &gap_node))