code: function(callback){
          var on_keyspace = function(err){
              if(err){ return callback(err);}
              this._set_client(new cql.Client(this._connection));
              callback(err, this);
          };
  
          if(this._keyspace){
              this._assert_keyspace( on_keyspace.bind(this) );
          }else{
              on_keyspace.call(this);
          }
      }
docs: Connect your instance of Apollo to Cassandra
  @param  {Apollo~onConnect} callback Callback on connection result