private static boolean checkRawAcceptable(
     PsiLambdaExpression expression, PsiType functionalInterfaceType) {
   PsiElement parent = expression.getParent();
   while (parent instanceof PsiParenthesizedExpression) {
     parent = parent.getParent();
   }
   if (parent instanceof PsiExpressionList) {
     final PsiElement gParent = parent.getParent();
     if (gParent instanceof PsiMethodCallExpression) {
       final PsiExpression qualifierExpression =
           ((PsiMethodCallExpression) gParent).getMethodExpression().getQualifierExpression();
       final PsiType type = qualifierExpression != null ? qualifierExpression.getType() : null;
       if (type instanceof PsiClassType && ((PsiClassType) type).isRaw()) {
         return true;
       }
       final PsiMethod method = ((PsiMethodCallExpression) gParent).resolveMethod();
       if (method != null) {
         int lambdaIdx = getLambdaIdx((PsiExpressionList) parent, expression);
         final PsiParameter[] parameters = method.getParameterList().getParameters();
         final PsiType normalizedType =
             getNormalizedType(parameters[adjustLambdaIdx(lambdaIdx, method, parameters)]);
         if (normalizedType instanceof PsiClassType && ((PsiClassType) normalizedType).isRaw())
           return true;
       }
     }
     if (functionalInterfaceType instanceof PsiClassType
         && ((PsiClassType) functionalInterfaceType).isRaw()) {
       return false;
     }
   }
   return true;
 }