Given a possibly special behavior (same or unhandled) and a
“current” behavior (which defines the meaning of encountering a Same
behavior) this method unwraps the behavior such that the innermost behavior
is returned, i.e.
Given a possibly special behavior (same or unhandled) and a
“current” behavior (which defines the meaning of encountering a Same
behavior) this method unwraps the behavior such that the innermost behavior
is returned, i.e. it removes the decorations.