@Override
 public void visitLiteralExpression(@NotNull PsiLiteralExpression expression) {
   super.visitLiteralExpression(expression);
   final PsiType type = expression.getType();
   if (!ClassUtils.isPrimitiveNumericType(type)) {
     return;
   }
   if (PsiType.CHAR.equals(type)) {
     return;
   }
   if (isSpecialCaseLiteral(expression)) {
     return;
   }
   if (ExpressionUtils.isDeclaredConstant(expression)) {
     return;
   }
   if (ignoreInHashCode) {
     final PsiMethod containingMethod = PsiTreeUtil.getParentOfType(expression, PsiMethod.class);
     if (MethodUtils.isHashCode(containingMethod)) {
       return;
     }
   }
   if (ignoreInTestCode && TestUtils.isInTestCode(expression)) {
     return;
   }
   final PsiElement parent = expression.getParent();
   if (parent instanceof PsiPrefixExpression) {
     registerError(parent);
   } else {
     registerError(expression);
   }
 }
 @Override
 public void visitLiteralExpression(@NotNull PsiLiteralExpression value) {
   super.visitLiteralExpression(value);
   final String text = value.getText();
   if (!PsiKeyword.NULL.equals(text)) {
     return;
   }
   PsiElement parent = value.getParent();
   while (parent instanceof PsiParenthesizedExpression
       || parent instanceof PsiConditionalExpression
       || parent instanceof PsiTypeCastExpression) {
     parent = parent.getParent();
   }
   if (parent == null || !(parent instanceof PsiReturnStatement)) {
     return;
   }
   final PsiMethod method = PsiTreeUtil.getParentOfType(value, PsiMethod.class);
   if (method == null) {
     return;
   }
   final PsiType returnType = method.getReturnType();
   if (returnType == null) {
     return;
   }
   final boolean isArray = returnType.getArrayDimensions() > 0;
   if (AnnotationUtil.isAnnotated(method, AnnotationUtil.NULLABLE, false)) {
     return;
   }
   if (m_reportCollectionMethods && CollectionUtils.isCollectionClassOrInterface(returnType)) {
     registerError(value, value);
   } else if (m_reportArrayMethods && isArray) {
     registerError(value, value);
   } else if (m_reportObjectMethods && !isArray) {
     registerError(value, value);
   }
 }
 @Override
 public void visitLiteralExpression(PsiLiteralExpression expression) {
   super.visitLiteralExpression(expression);
   checkExpression(expression);
 }