@Override
    public void visitInstanceOfExpression(@NotNull PsiInstanceOfExpression expression) {
      super.visitInstanceOfExpression(expression);
      final PsiTypeElement checkTypeElement = expression.getCheckType();
      if (checkTypeElement == null) {
        return;
      }
      final PsiType checkType = checkTypeElement.getType();
      if (!(checkType instanceof PsiClassType checkClassType)) {
        return;
      }
      final PsiExpression operand = expression.getOperand();
      final PsiType operandType = operand.getType();
      if (!(operandType instanceof PsiClassType operandClassType)) {
        return;
      }
      if (DfaPsiUtil.isAssertionEffectively(expression, false)) {
        return;
      }
      if (!TypeConversionUtil.areTypesConvertible(operandClassType, checkType)) {
        return; // don't warn on uncompilable code
      }
      final PsiClass checkClass = checkClassType.resolve();
      if (checkClass == null) {
        return;
      }
      final PsiClass operandClass = operandClassType.resolve();
      if (operandClass == null) {
        return;
      }
      final String operandClassName = operandClass.getName();
      if (operandClassName == null) {
        return;
      }
      ThreeState hasMutualSubclass = InheritanceUtil.existsMutualSubclass(operandClass, checkClass, isOnTheFly());
      if (hasMutualSubclass == ThreeState.NO) {
        registerError(checkTypeElement, checkClass.isInterface(), operandClassName);
      }
      else if (hasMutualSubclass == ThreeState.UNSURE) {
        registerPossibleProblem(checkTypeElement);
      }
    }
@Override
    public void visitInstanceOfExpression(@NotNull PsiInstanceOfExpression expression)