code: def factory(self):
      # If no factory is specified and the type is another CheckedType use the factory method of that CheckedType
      if self._factory is PFIELD_NO_FACTORY and len(self.type) == 1:
          typ = get_type(tuple(self.type)[0])
          if issubclass(typ, CheckedType):
              return typ.create
  
      return self._factory
  
imports: from pyrsistent._checked_types import CheckedPMap, CheckedPSet, CheckedPVector, CheckedType, InvariantException, _restore_pickle, get_type, maybe_parse_user_type, maybe_parse_many_user_types
  from pyrsistent._checked_types import optional
  from pyrsistent._checked_types import wrap_invariant
  import inspect
label_desc: Use image node_id 2 for calling the _PField obj's underlying member method code with example usage: obj.factory() and returns: self, typ