Operations from mapped to classes not callable

[Matthias Schoettle]

Similar to #285, consider the following example (based on Association):

1. Association contains |Data and |Collection, with an association
2. Kind and Ordered both (in the extended hierarchy) both extend |Collection.
3. LinkedList extends Ordered and maps |Collection to java.util.LinkedList
4. In the message view for getFirst(), a new message is created
5. Select myCollection:|Collection (which is coming from Association)

Actual Result:

Only the methods from |Collection in Association are shown.

Expected Result:

All methods of the mapped to class should be shown. We might even only want to show those, none of the other ones from |Collection.

[Matthias Schoettle]

References #321: Takes into consideration the classifier that a found classifier was mapped to. I.e., the mapped to classifier's operations should be callable too.

Currently, it collects all mapped to classifiers, but this might have to be restricted to just one.

→ <<cset 8b8f5c76b937>>