code: function (astList, context, callback) {
  	var retval = new Array(astList.length);
  	asyncEach(astList, function (ast, i, done) {
  		run(ast, context, function (err, val) {
  			if (err) {
  				callback(err);
  			} else {
  				retval[i] = val;
  				done();
  			}
  		});
  	}, callback, null, retval);
  }
docs: Get the arguments of the current AST node
  
  @param {Array} astList
  @param {Object} context
  @param {Function} callback