@Override
 public void visitNode(Tree tree) {
   BinaryExpressionTree binaryExpressionTree = (BinaryExpressionTree) tree;
   if (hasEquivalentOperand(binaryExpressionTree)) {
     addIssue(
         binaryExpressionTree.rightOperand(),
         "Identical sub-expressions on both sides of operator \""
             + binaryExpressionTree.operatorToken().text()
             + "\"");
   }
 }