anchor.diff:  
     DartType unalias(Compiler compiler) => this;
   
  +  accept(DartTypeVisitor visitor, var argument) {
  +    return visitor.visitStatementType(this, argument);
  +  }
  +
     int get hashCode => 17 * stringName.hashCode;
   
     bool operator ==(other) {
  
positive.code:   bool forEachMalformedType(bool f(MalformedType type)) => f(this);
  
    DartType unalias(Compiler compiler) => this;
  
    String toString() {
      var sb = new StringBuffer();
  
negative.code:   DynamicType(ClassElement element) : super(element);
  
    SourceString get name => const SourceString('dynamic');
  
    accept(DartTypeVisitor visitor, var argument) {
      return visitor.visitDynamicType(this, argument);
    }
  }
  
  /**
  