pub unsafe extern "C" fn btck_block_tree_entry_get_ancestor(
block_tree_entry: *const btck_BlockTreeEntry,
height: i32,
) -> *const btck_BlockTreeEntrypub unsafe extern "C" fn btck_block_tree_entry_get_ancestor(
block_tree_entry: *const btck_BlockTreeEntry,
height: i32,
) -> *const btck_BlockTreeEntry