anchor.diff:  
     String visitCreateFunction(CreateFunction node) {
       String function = visit(node.definition);
  -    return '(CreateFunction ${node.definition.element} $function)';
  +    return '(CreateFunction $function)';
     }
   
     String visitParameter(Parameter node) {
  
positive.code:   String newContinuationName() => 'k${_continuationCounter++}';
  
    String visitFunctionDefinition(FunctionDefinition node) {
      names[node.returnContinuation] = 'return';
      String parameters = node.parameters
          .map((Parameter p) {
  
negative.code:           return name;
          })
          .join(' ');
      String body = visit(node.body);
      return '(FunctionDefinition $name ($parameters return) $body)';
    }
  
    String visitLetPrim(LetPrim node) {
  