Cache for dangling objects

For example, since Valentina is designed as a kind of WYSIWYG software, we cannot modify a pattern to a temporally inconsistent state. For example Valentina will not accept to have a line defined by point that don’t exist anymore. For a computer program, your are free to save something which is broken and fix things later. However for a GUI parametric modeller this flexibility is more challenging. Software like Fusion 360 implements a cache for dangling objects.