code: def _discover_models(self):
          
  
          apps = get_installed_apps()
          connection = self.connection.connection.alias
          keyspace = self.connection.connection.keyspace
  
          for app in apps:
              self._cql_models[app.__name__] = get_cql_models(
                  app, connection=connection, keyspace=keyspace)
docs: Return a dict containing a list of cassandra.cqlengine.Model classes
          within installed App.