add_property
void add_property(struct node *node, struct property *prop);
add_property(node, prop);
add_property(tree, prop);
add_property(old_node, new_prop);
add_property(node, p);
add_property(node, p);
add_property(node, p);
add_property(node, build_property(name, d, NULL));
add_property(an, p);