get_next_attr
status_t (*get_next_attr)(device_node *node, device_attr **_attr);
while (gDeviceManager->get_next_attr(parent, &attr) == B_OK) {
get_next_attr,
return gDeviceManager->get_next_attr(cook->child, &cook->attr);
get_next_attr,
status_t (*get_next_attr)(device_node *node, device_attr **_attr);