private static CaseLabelTree getDefaultLabel(SwitchStatementTree switchStatementTree) {
   for (CaseGroupTree caseGroupTree : switchStatementTree.cases()) {
     for (CaseLabelTree caseLabelTree : caseGroupTree.labels()) {
       if (JavaKeyword.DEFAULT.getValue().equals(caseLabelTree.caseOrDefaultKeyword().text())) {
         return caseLabelTree;
       }
     }
   }
   return null;
 }
 @Override
 public void visitNode(Tree tree) {
   SwitchStatementTree switchStatementTree = (SwitchStatementTree) tree;
   CaseLabelTree defaultLabel = getDefaultLabel(switchStatementTree);
   CaseLabelTree lastLabel = getLastLabel(switchStatementTree);
   if (defaultLabel == null) {
     reportIssue(switchStatementTree.switchKeyword(), "Add a default case to this switch.");
   } else if (!defaultLabel.equals(lastLabel)) {
     reportIssue(defaultLabel, "Move this default to the end of the switch.");
   }
 }