nl_tokens: A Hint that arose as a result of a Conversion
pl_tokens: function ConversionHint ( conversion , arg ) { this . status = conversion . status ; this . message = conversion . message ; if ( arg ) { this . start = arg . <mask> ; this . end = arg . end ; } else { this . start = 0 ; this . end = 0 ; } this . predictions = conversion . predictions ; }