@staticmethod
def all(registry, effective_name, objct):
    """Assign all of the possible options.

        Collect all registered items into a set,
        and assign that set to a name. Note that
        even if only one item is assigned to a name,
        that name will be assigned to a set of length 1.
        """
    myset = registry.get(effective_name, set())
    myset.add(objct)
    return myset
