get_subtree_max_size
get_subtree_max_size(va->rb_node.rb_left),
get_subtree_max_size(va->rb_node.rb_right));
if (get_subtree_max_size(node->rb_left) >= length &&
if (get_subtree_max_size(node->rb_right) >= length) {
if (get_subtree_max_size(node->rb_right) >= length &&