code: def get_parent_ps(self):
          
          if self._bundle is None:
              return None
  
          metawargs = {k:v for k,v in self.meta.items() if k not in ['qualifier', 'twig', 'uniquetwig']}
  
          return self._bundle.filter(**metawargs)
docs: Return a :class:`ParameterSet` of all Parameters in the same
          :class:`phoebe.frontend.bundle.Bundle` which share the same
          meta-tags (except qualifier, twig, uniquetwig)
  
          :return: the parent :class:`ParameterSet`