public void visitSwitch(SwitchStatement statement) {
   statement.getExpression().visit(this);
   for (CaseStatement caseStatement : statement.getCaseStatements()) {
     caseStatement.visit(this);
   }
   statement.getDefaultStatement().visit(this);
 }
 public void visitCaseStatement(CaseStatement statement) {
   statement.getExpression().visit(this);
   statement.getCode().visit(this);
 }