Just to say I moved Loader to Provider-Listener that will be moved to config further.
Also as an effect, there is no reason in TableViewer subclass anymore... Which is to my mind a little bit cleaner but more unOOPy.
Some Workaround of RubbishTest3 (how it is called now). Also deleted empty file. And tried to swap Prop_Container to Prop_Integer. NOt tested yet.