void btr_log_tree(struct btr_node *btrn, int loglevel);
int btr_pushdown_one(struct btr_node *btrn);
bool btr_inplace_ok(struct btr_node *btrn);
void btr_log_tree(struct btr_node *btrn, int loglevel);
int btr_pushdown_one(struct btr_node *btrn);
bool btr_inplace_ok(struct btr_node *btrn);