code: def django_table_names(self, only_existing=False, **kwargs):
          
  
          all_models = list(chain.from_iterable(self.cql_models.values()))
          tables = [model.column_family_name(include_keyspace=False)
                    for model in all_models]
  
          return tables
docs: Returns a list of all table names that have associated cqlengine models
          and are present in settings.INSTALLED_APPS.