Solve strong coupling between NewModelObserver and AttributeInspector

[Aerilius]

sketchup-attribute-inspector/src/ae_attribute_inspector/observers.rb

Line 181 in 47dff7b

@instance.model = model

This observer class assumes/requires that the passed instance has a model= method. In the case here, AttributeInspector's model= does two tasks, transfering (removing, adding) observers to the new model and getting the current selection of the new model.

Check if this can be better solved with a more abstract "PersistentObserver" that takes care to add observers to subentities of whatever model is active.