How to use the azure-mgmt-servicebus.azure.mgmt.servicebus.models.__dict__.items function in azure-mgmt-servicebus

def __init__(
            self, credentials, subscription_id, base_url=None):

        self.config = ServiceBusManagementClientConfiguration(credentials, subscription_id, base_url)
        super(ServiceBusManagementClient, self).__init__(self.config.credentials, self.config)

        client_models = {k: v for k, v in models.__dict__.items() if isinstance(v, type)}
        self.api_version = '2017-04-01'
        self._serialize = Serializer(client_models)
        self._deserialize = Deserializer(client_models)

        self.operations = Operations(
            self._client, self.config, self._serialize, self._deserialize)
        self.namespaces = NamespacesOperations(
            self._client, self.config, self._serialize, self._deserialize)
        self.disaster_recovery_configs = DisasterRecoveryConfigsOperations(
            self._client, self.config, self._serialize, self._deserialize)
        self.migration_configs = MigrationConfigsOperations(
            self._client, self.config, self._serialize, self._deserialize)
        self.queues = QueuesOperations(
            self._client, self.config, self._serialize, self._deserialize)
        self.topics = TopicsOperations(
            self._client, self.config, self._serialize, self._deserialize)