def enter_Field(self, node):
        parent_type = self.get_parent_type()
        field_def = None
        if parent_type:
            field_def = self._get_field_def_fn(self._schema, parent_type, node)
        self._field_def_stack.append(field_def)
        self._type_stack.append(field_def or field_def.type)
dataset/ETHPy150Open graphql-python/graphql-core/graphql/core/utils/type_info.py/TypeInfo.enter_Field/operator `and` -> `or`