protected void weaveMixinClass(ClassNode classNode, Class mixinClass) {
   ListExpression listExpression = new ListExpression();
   listExpression.addExpression(new ClassExpression(new ClassNode(mixinClass)));
   weaveMixinsIntoClass(classNode, listExpression);
 }
 public void visitListExpression(ListExpression expression) {
   visitListOfExpressions(expression.getExpressions());
 }