private static void checkSillyAssignment(
     PsiAssignmentExpression assignment, ProblemsHolder holder) {
   if (assignment.getOperationTokenType() != JavaTokenType.EQ) return;
   PsiExpression lExpression = assignment.getLExpression();
   PsiExpression rExpression = assignment.getRExpression();
   if (rExpression == null) return;
   lExpression = PsiUtil.deparenthesizeExpression(lExpression);
   rExpression = PsiUtil.deparenthesizeExpression(rExpression);
   if (!(lExpression instanceof PsiReferenceExpression)) return;
   PsiReferenceExpression rRef;
   if (!(rExpression instanceof PsiReferenceExpression)) {
     if (!(rExpression instanceof PsiAssignmentExpression)) return;
     final PsiAssignmentExpression rAssignmentExpression = (PsiAssignmentExpression) rExpression;
     final PsiExpression assignee =
         PsiUtil.deparenthesizeExpression(rAssignmentExpression.getLExpression());
     if (!(assignee instanceof PsiReferenceExpression)) return;
     rRef = (PsiReferenceExpression) assignee;
   } else {
     rRef = (PsiReferenceExpression) rExpression;
   }
   PsiReferenceExpression lRef = (PsiReferenceExpression) lExpression;
   PsiManager manager = assignment.getManager();
   if (!sameInstanceReferences(lRef, rRef, manager)) return;
   final PsiVariable variable = (PsiVariable) lRef.resolve();
   if (variable == null) return;
   holder.registerProblem(
       assignment,
       InspectionsBundle.message("assignment.to.itself.problem.descriptor", variable.getName()),
       ProblemHighlightType.LIKE_UNUSED_SYMBOL);
 }
 private static boolean onTheLeftSideOfConditionalAssignment(final PsiElement psiAnchor) {
   final PsiElement parent = psiAnchor.getParent();
   if (parent instanceof PsiAssignmentExpression) {
     final PsiAssignmentExpression expression = (PsiAssignmentExpression) parent;
     if (expression.getLExpression() == psiAnchor) return true;
   }
   return false;
 }