bool set_width(ValueNode::Handle x);
bool set_specify_start(ValueNode::Handle a);
bool set_specify_end(ValueNode::Handle a);
bool set_start_color(ValueNode::Handle a);
bool set_end_color(ValueNode::Handle a);
bool set_width(ValueNode::Handle x);
bool set_specify_start(ValueNode::Handle a);
bool set_specify_end(ValueNode::Handle a);
bool set_start_color(ValueNode::Handle a);
bool set_end_color(ValueNode::Handle a);