docs: def _callOnOrganizerPlugins(self, methodName, *args):
          """
          Call a method on all L{IOrganizerPlugin} powerups on C{self.store}, or
          emit a deprecation warning for each one which does not implement that
          method.
          """
          for observer in self.getOrganizerPlugins():
              method = getattr(observer, methodName, None)
              if method is not None:
                  method(*args)
              else:
                  warn(
                      "IOrganizerPlugin now has the %s method, %s "
                      "did not implement it" % (methodName, observer.__class__,),
                      category=PendingDeprecationWarning)