nl_tokens: Loads the cached database
pl_tokens: function ( callback ) { var t = this ; async . waterfall ( [ function readDb ( callback ) { fs . exists ( t . __dbFilename , function ( exists ) { if ( exists ) { fs . readFile ( t . __dbFilename , { encoding : "utf-8" } , callback ) ; } else { <mask> ( null , null ) ; } } ) ; } , function parseDb ( data , callback ) { t . __db = data && data . trim ( ) . length ? jsonlint . parse ( data ) : { } ; callback ( null , t . __db ) ; } ] , callback ) ; }