code: def get_declared_fields(mcs, klass, cls_fields, inherited_fields, dict_cls):
          
          opts = klass.opts
          converter = opts.model_converter(schema_cls=klass)
          base_fields = _BaseModelSerializerMetaclass.get_declared_fields(
              klass, cls_fields, inherited_fields, dict_cls)
          declared_fields = mcs.get_fields(converter, opts, base_fields, dict_cls)
          if declared_fields is not None:  # prevents sphinx from blowing up
              declared_fields.update(base_fields)
          return declared_fields
docs: Updates declared fields with fields converted from the SQLAlchemy model
          passed as the `model` class Meta option.