anchor.diff:    ///       (){ compute();completer.complete(result);}
     ///      ,...]}
     ///
  -  /// mutate calls, pops and adds to completer_pool.
  +  /// the method [mutate] calls, pops and adds to completer_pool.
     static Map<String, List<Function>> completer_pool = {};
     /// See the file mutator_example.dart
  -  /// in example folder.
  +  /// in example folder for usage.
     ///
     ///Takes:
     /// +  class name.
  
positive.code:   ///         invocation = invocation.join('.') +
    ///             '.set(\'${name}\', ${l.join('=')})';
    ///         return invocation;
    ///
    ///       }
    ///
    /// Only nodes of type T that match the
  
negative.code:   /// +  replacer function.
    /// e.g.
    ///
    ///     String replacer(AstNode e){
    ///         String s = e.toString();
    ///         List l  = s.split('=');
    ///         var invocation = l.removeAt(0).split('.');
  