How to use the stone.ir.is_map_type function in stone

"""
        data_type = annotated_object.data_type
        name = annotated_object.name
        loc = annotated_object._ast_node.lineno, annotated_object._ast_node.path
        curr_data_type = data_type

        while isinstance(curr_data_type, Alias) or isinstance(curr_data_type, Nullable):
            # aliases have redactors assocaited with the type itself
            if hasattr(curr_data_type, 'redactor') and curr_data_type.redactor:
                raise InvalidSpec("A redactor has already been defined for '%s' by '%s'." %
                                  (str(name), str(curr_data_type.name)), *loc)

            curr_data_type = curr_data_type.data_type

        if hasattr(annotated_object, 'redactor') and annotated_object.redactor:
            if is_map_type(curr_data_type) or is_list_type(curr_data_type):
                while True:
                    if is_map_type(curr_data_type):
                        curr_data_type = curr_data_type.value_data_type
                    else:
                        curr_data_type = curr_data_type.data_type

                    should_continue = (is_map_type(curr_data_type) or is_list_type(curr_data_type)
                        or is_nullable_type(curr_data_type))

                    if should_continue is False:
                        break

            if is_user_defined_type(curr_data_type) or is_void_type(curr_data_type):
                raise InvalidSpec("Redactors can't be applied to user-defined or void types.", *loc)

def _fmt_serialization_call(self, data_type, input_value, serialize, depth=0):
        """Returns the appropriate serialization / deserialization method
        call for the given data type."""
        data_type, _ = unwrap_nullable(data_type)
        serializer_func = 'serialize' if serialize else 'deserialize'
        serializer_args = []

        if is_primitive_type(data_type):
            return input_value

        if is_list_type(data_type) or is_map_type(data_type):
            serializer_args.append(('value', input_value))
            elem_data_type = (data_type.value_data_type if
                is_map_type(data_type) else data_type.data_type)
            serialization_call = self._fmt_serialization_call(
                elem_data_type, 'elem{}'.format(depth), serialize, depth + 1)
            data_struct_block = '^id(id elem{}) {{ return {}; }}'.format(
                depth, serialization_call)
            serializer_args.append(('withBlock', data_struct_block))
        elif is_timestamp_type(data_type):
            serializer_args.append(('value', input_value))
            serializer_args.append(('dateFormat',
                                    '@"{}"'.format(data_type.format)))
        else:
            serializer_args.append(('value', input_value))

        return '{}'.format(

if not is_void_type(route.error_data_type):
                        caller = fmt_class_type(
                            route.error_data_type, suppress_ptr=True)
                        error_type = fmt_func_call(
                            caller=caller, callee='class')
                    else:
                        error_type = 'nil'

                    if is_list_type(route.arg_data_type) or is_map_type(route.arg_data_type):
                        dataStructSerialBlock = '^id(id dataStruct) {{ return {}; }}'.format(
                            self._fmt_serialization_call(
                                route.result_data_type, 'dataStruct', True))
                    else:
                        dataStructSerialBlock = 'nil'

                    if is_list_type(route.result_data_type) or is_map_type(route.result_data_type):
                        dataStructDeserialBlock = '^id(id dataStruct) {{ return {}; }}'.format(
                            self._fmt_serialization_call(
                                route.result_data_type, 'dataStruct', False))
                    else:
                        dataStructDeserialBlock = 'nil'

                    with self.block_func(
                            func=route_name,
                            args=[],
                            return_type='DBRoute *',
                            class_func=True):
                        with self.block('if (!{})'.format(route_name)):
                            with self.block(
                                    '{} = [[DBRoute alloc] init:'.format(
                                        route_name),
                                    delim=(None, None),

# aliases have redactors assocaited with the type itself
            if hasattr(curr_data_type, 'redactor') and curr_data_type.redactor:
                raise InvalidSpec("A redactor has already been defined for '%s' by '%s'." %
                                  (str(name), str(curr_data_type.name)), *loc)

            curr_data_type = curr_data_type.data_type

        if hasattr(annotated_object, 'redactor') and annotated_object.redactor:
            if is_map_type(curr_data_type) or is_list_type(curr_data_type):
                while True:
                    if is_map_type(curr_data_type):
                        curr_data_type = curr_data_type.value_data_type
                    else:
                        curr_data_type = curr_data_type.data_type

                    should_continue = (is_map_type(curr_data_type) or is_list_type(curr_data_type)
                        or is_nullable_type(curr_data_type))

                    if should_continue is False:
                        break

            if is_user_defined_type(curr_data_type) or is_void_type(curr_data_type):
                raise InvalidSpec("Redactors can't be applied to user-defined or void types.", *loc)

for t in doc_types:
                    self._find_dependencies_recursive(t, seen, output_types, output_routes)
                for namespace_name, routes in routes_by_ns.items():
                    route_namespace = self.api.namespaces[namespace_name]
                    for route in routes:
                        output_routes[namespace_name].add(route)
                        route_types = route_namespace.get_route_io_data_types_for_route(route)
                        for route_type in route_types:
                            self._find_dependencies_recursive(route_type, seen, output_types,
                                                              output_routes)
        elif is_list_type(data_type) or is_nullable_type(data_type):
            # recurse on underlying field for aliases, lists, nullables, and fields
            seen.add(data_type)
            self._find_dependencies_recursive(data_type.data_type, seen, output_types,
                                              output_routes)
        elif is_map_type(data_type):
            # recurse on key/value fields for maps
            seen.add(data_type)
            self._find_dependencies_recursive(data_type.key_data_type, seen, output_types,
                                              output_routes)
            self._find_dependencies_recursive(data_type.value_data_type, seen, output_types,
                                              output_routes)
        else:
            assert False, "Unexpected type in: %s" % data_type

name = annotated_object.name
        loc = annotated_object._ast_node.lineno, annotated_object._ast_node.path
        curr_data_type = data_type

        while isinstance(curr_data_type, Alias) or isinstance(curr_data_type, Nullable):
            # aliases have redactors assocaited with the type itself
            if hasattr(curr_data_type, 'redactor') and curr_data_type.redactor:
                raise InvalidSpec("A redactor has already been defined for '%s' by '%s'." %
                                  (str(name), str(curr_data_type.name)), *loc)

            curr_data_type = curr_data_type.data_type

        if hasattr(annotated_object, 'redactor') and annotated_object.redactor:
            if is_map_type(curr_data_type) or is_list_type(curr_data_type):
                while True:
                    if is_map_type(curr_data_type):
                        curr_data_type = curr_data_type.value_data_type
                    else:
                        curr_data_type = curr_data_type.data_type

                    should_continue = (is_map_type(curr_data_type) or is_list_type(curr_data_type)
                        or is_nullable_type(curr_data_type))

                    if should_continue is False:
                        break

            if is_user_defined_type(curr_data_type) or is_void_type(curr_data_type):
                raise InvalidSpec("Redactors can't be applied to user-defined or void types.", *loc)

def _fmt_serialization_call(self, data_type, input_value, serialize, depth=0):
        """Returns the appropriate serialization / deserialization method
        call for the given data type."""
        data_type, _ = unwrap_nullable(data_type)
        serializer_func = 'serialize' if serialize else 'deserialize'
        serializer_args = []

        if is_primitive_type(data_type):
            return input_value

        if is_list_type(data_type) or is_map_type(data_type):
            serializer_args.append(('value', input_value))
            elem_data_type = (data_type.value_data_type if
                is_map_type(data_type) else data_type.data_type)
            serialization_call = self._fmt_serialization_call(
                elem_data_type, 'elem{}'.format(depth), serialize, depth + 1)
            data_struct_block = '^id(id elem{}) {{ return {}; }}'.format(
                depth, serialization_call)
            serializer_args.append(('withBlock', data_struct_block))
        elif is_timestamp_type(data_type):
            serializer_args.append(('value', input_value))
            serializer_args.append(('dateFormat',
                                    '@"{}"'.format(data_type.format)))
        else:
            serializer_args.append(('value', input_value))

        return '{}'.format(
            fmt_func_call(
                caller=fmt_serial_obj(data_type),
                callee=serializer_func,

def generate_validator_constructor(ns, data_type):
    """
    Given a Stone data type, returns a string that can be used to construct
    the appropriate validation object in Python.
    """
    dt, nullable_dt = unwrap_nullable(data_type)
    if is_list_type(dt):
        v = generate_func_call(
            'bv.List',
            args=[
                generate_validator_constructor(ns, dt.data_type)],
            kwargs=[
                ('min_items', dt.min_items),
                ('max_items', dt.max_items)],
        )
    elif is_map_type(dt):
        v = generate_func_call(
            'bv.Map',
            args=[
                generate_validator_constructor(ns, dt.key_data_type),
                generate_validator_constructor(ns, dt.value_data_type),
            ]
        )
    elif is_numeric_type(dt):
        v = generate_func_call(
            'bv.{}'.format(dt.name),
            kwargs=[
                ('min_value', dt.min_value),
                ('max_value', dt.max_value)],
        )
    elif is_string_type(dt):
        pattern = None