nl_tokens: / * given a file / callback goes and reads out all the info!
pl_tokens: function ( filename , callback ) { var fileInfo = { filename : filename } ; var that = this ; var allDone = pipeline ( [ function ( ) { return that . _loadFile ( filename ) ; } , function ( fileBuffer ) { fileInfo . fileBuffer = fileBuffer ; return that . parseBuffer ( fileInfo ) ; } ] ) ; if ( <mask> ) { when ( allDone ) . then ( function ( info ) { callback ( info , null ) ; } , function ( err ) { callback ( null , err ) ; } ) ; } return allDone ; }