I have logic that shared across two components and both are extensions of
ListBase - a List and a DataGrid. I want to create a Base Class for both of
these components, so that they can share the same logic. For example, both have
an itemDoubleClick event handler, as well as a keyUp event handler, that both
dispatch custom Events.

How can I do this??? I don't want to monkey-patch.... There's got to be a
simpler way....

Thanks.