Create (extend) a common interface for different multi widgets (editors) to allow to substitute the QmitkStdMultiWidget(Editor) in classes / functions that currently need a QmitkStdMultiWidget(Editor), but should work with the new QmitkCustomMultiWidget(Editor).
Is this reasonable, or should we strive to create a custom multi widget (editor) in a way that we can substitute the custom variant for the standard variant (and change all occurrences of std with custom)?