nl_tokens: Query options
pl_tokens: function <mask> ( options ) { events . EventEmitter . call ( this ) ; this . options = clientOptions . extend ( { logEmitter : this . emit . bind ( this ) } , options ) ; Object . defineProperty ( this , 'profileManager' , { value : new ProfileManager ( this . options ) } ) ; Object . defineProperty ( this , 'controlConnection' , { value : new ControlConnection ( this . options , this . profileManager ) , writable : true } ) ; //Unlimited amount of listeners for internal event queues by default this . setMaxListeners ( 0 ) ; this . connected = false ; this . isShuttingDown = false ; /**
     * Gets the name of the active keyspace.
     * @type {String}
     */ this . keyspace = options . keyspace ; /**
     * Gets the schema and cluster metadata information.
     * @type {Metadata}
     */ this . metadata = this . controlConnection . metadata ; /**
     * Gets an associative array of cluster hosts.
     * @type {HostMap}
     */ this . hosts = this . controlConnection . hosts ; /**
     * The [ClientMetrics]{@link module:metrics~ClientMetrics} instance used to expose measurements of its internal
     * behavior and of the server as seen from the driver side.
     * <p>By default, a [DefaultMetrics]{@link module:metrics~DefaultMetrics} instance is used.</p>
     * @type {ClientMetrics}
     */ this . metrics = this . options . metrics ; }