code: def alias(self, annotationtype, set, fallback=False):
          
          if inspect.isclass(annotationtype): annotationtype = annotationtype.ANNOTATIONTYPE
          if annotationtype in self.set_alias and set in self.set_alias[annotationtype]:
              return self.set_alias[annotationtype][set]
          elif fallback:
              return set
          else:
              raise KeyError("No alias for set " + set)
docs: Return the alias for a set (if applicable, returns the unaltered set otherwise iff fallback is enabled)