code: def update_field_forward_refs(field: 'Field', globalns: Any, localns: Any) -> None:
      
      if type(field.type_) == ForwardRef:
          field.type_ = field.type_._evaluate(globalns, localns or None)  # type: ignore
          field.prepare()
      if field.sub_fields:
          for sub_f in field.sub_fields:
              update_field_forward_refs(sub_f, globalns=globalns, localns=localns)
docs: Try to update ForwardRefs on fields based on this Field, globalns and localns.