code: def independent_from(self, other):
          
          if self is other:
              return False
          return not self.orders_after(other) and not other.orders_after(self)
docs: Return whether the services are independent (neither depends on
          the other).
  
          :param other: Another service.
          :type other: :class:`aioxmpp.service.Service`
  
          .. versionadded:: 0.11