§4.8.(b) Qualified and unqualified names
Within a role class a callin binding may be referenced by its unqualified name.
A precedence declaration in a team class must qualify the callin name with the name of the declaring
role class. A team with nested teams may concat role class names.
Elements of a qualified callin name are separated by ".".
The callin binding must be found in the role specified by the qualifying prefix or
in the enclosing role for unqualified names, or any super class of this role
(including implicit super classes §1.3.1).