nl_tokens: BaseImporter psuedo class to be extended
pl_tokens: function BaseImporter ( ) { this . _schema = null ; this . _export = null ; this . _types = { } ; this . _model = { properties : { } , definitions : { } , ids : { } } ; this . error = null ; var baseImporter = this ; //setup listeners
   this . on ( 'readyStateChanged' , function ( readyState ) { //state changed
   if ( readyStates . complete === readyState ) { //state says loading has finished
   if ( baseImporter . error ) { baseImporter . emit ( 'failed' , baseImporter . error ) ; } else { baseImporter . emit ( 'success' , null , baseImporter . getModel ( ) ) ; } //send general complete notification
   baseImporter . emit ( 'complete' , baseImporter . <mask> , baseImporter . getModel ( ) ) ; } } ) ; }