nl_tokens: A property entity useing the protective {} e . g . $ { prop }
pl_tokens: function ( ) { var curly , index = parserInput . i ; if ( parserInput . currentChar ( ) === '$' && ( curly = parserInput . $re ( / ^\$\{([\w-]+)\} / ) ) ) { return new ( <mask> . Property ) ( '$' + curly [ 1 ] , index , fileInfo ) ; } }