packages/krl-parser/src/grammar.js
function(x){
      if(!x || x.type !== type){
        return false;
      }
      if(value){
        return x.src === value;
      }
      return true;
    }
function(x){
      if(!x || x.type !== type){
        return false;
      }
      if(value){
        return x.src === value;
      }
      return true;
    }
function ( x ) { if ( ! x || x . type !== type ) { return false ; } if ( value ) { return x . src === value ; } return true ; }
hint for "unparsing"
hint for unparsing