Introduce realization_view for activities / functions

[vik378]

Given an activity / function object, lets add a method "realization_view" that would show what functions from the levels below and/or above realize it and what components / entities this functions belong to (who is responsible for it)

Parameters:

• Depth should be defaulted to 1, but could be manually tuned up to all layers below.
• direction (of search): layers above, layers below, all; default: all
• show owning (responsible) components / entities; default: true

Examples

• realization_view called on Function 1 with depth 1 and direction "above" and show_owners=True

• realization_view called on Activity, depth 1, direction "below", show owners=True

[MS34449]

Could we add an example for the other graphical variant using "wrapper boxes", that we have discussed already?

Here is the Capella forum thread I have started on this topic, some ways to present realisation links are discussed there (title blocks, matrices), but none of them meet the need for a clean visual representation:

https://forum.mbse-capella.org/t/cross-level-realisation-links-in-diagrams/6462/3

[ewuerger]

Solved by #63. Therefore closed.