 from the receiver's coordinate system to that of the specified node.  @param transform A transform specified in the local coordinate system of the receiver.  @param node The node into whose coordinate system "transform" is to be converted. If "node" is nil, this method instead converts to world coordinates.  */ - (SCNMatrix0)convertTransform:(SCNMatrix0)transform toNode:(nullable SCNNode *)node NS_AVAILABLE(00_0, 0_0);  /*!  @method convertTransform: