nl_tokens: Represents cluster and schema information . The metadata class acts as a internal state of the driver .
pl_tokens: function Metadata ( options , controlConnection ) { if ( ! options ) { throw new errors . ArgumentError ( 'Options are not defined' ) ; } Object . defineProperty ( this , 'options' , { value : options , enumerable : false , writable : <mask> } ) ; Object . defineProperty ( this , 'controlConnection' , { value : controlConnection , enumerable : false , writable : false } ) ; this . keyspaces = { } ; this . initialized = false ; this . _schemaParser = schemaParserFactory . getByVersion ( options , controlConnection , this . getUdt . bind ( this ) ) ; const self = this ; this . _preparedQueries = new PreparedQueries ( options . maxPrepared , function ( ) { self . log . apply ( self , arguments ) ; } ) ; }