docs: public void visit(ASTNode[] nodes, SourceUnit source) {
          if (!(nodes[0] instanceof AnnotationNode) || !(nodes[1] instanceof AnnotatedNode)) {
              throw new RuntimeException("Internal error: wrong types: $node.class / $parent.class");
          }
          AnnotationNode node = (AnnotationNode) nodes[0];
  
          if (nodes[1] instanceof ClassNode) {
              addListenerToClass(source, (ClassNode) nodes[1]);
          } else {
              if ((((FieldNode)nodes[1]).getModifiers() & Opcodes.ACC_FINAL) != 0) {
                  source.getErrorCollector().addErrorAndContinue(new SyntaxErrorMessage(
                          new SyntaxException("@groovy.beans.Vetoable cannot annotate a final property.",
                                  node.getLineNumber(), node.getColumnNumber(), node.getLastLineNumber(), node.getLastColumnNumber()),
                          source));
              }
  
              addListenerToProperty(source, node, (AnnotatedNode) nodes[1]);
          }
      }