anchor.diff:      return input;
     }
   
  -  void writePostlude() {
  -    buff.write("})(${_bodies.join(",")});");
  +  String generatePostlude() {
  +    var map = {};
  +
  +    var i = 0;
  +    for (var n in _names) {
  +      if (_includes.contains(n)) {
  +        map[n] = _bodies[i];
  +      }
  +      i++;
  +    }
  +
  +    return "})(${_bodies.where((it) => map.values.contains(it)).join(",")});";
     }
   }
  
positive.code:       function(block, value) {
          for (var i in value) {
            if (value.hasOwnProperty(i)) {
              block(v);
            }
          }
        }
  
negative.code:     _bodies.add(minify(body));
    }
  
    void addTopLevel(String a, [String b]) {
      if (b == null) {
        _topLevel.add(a);
      } else {
        addTopLevel("var ${a} = ${b}");
      }
    }
  
    List<String> _topLevel = [];
    List<String> _includes = [];
  
    String generatePrelude() {
      var x = buff.toString();
      _includes = _names.where((it) => x.contains(it)).toList();
  
      var b = new StringBuffer();
      if (_topLevel.isNotEmpty) {
        b.write(_topLevel.join(";"));
        b.write(";");
      }
      b.write('(function(${_includes.join(",")}){var λ = {${_includes.contains("args") ? '"args": args' : ''}};');
      return b.toString();
    }
  
    final RegExp _WHITESPACE = new RegExp(r'''\s{2,}(?=([^"]*("|')[^"']*("|'))*[^"']*$)''');
  