- node->add_child("LeftCrop")->add_child_text (raw_convert<string> (_crop.left));
- node->add_child("RightCrop")->add_child_text (raw_convert<string> (_crop.right));
- node->add_child("TopCrop")->add_child_text (raw_convert<string> (_crop.top));
- node->add_child("BottomCrop")->add_child_text (raw_convert<string> (_crop.bottom));