How to use IgnoreMember to ignore a child property of a json object in VerifyTests

Question

I have a json string and I want the Verify library to ignore the child property bbb.

I can ignore the whole aaa property by await VerifyJson(result).IgnoreMember("aaa");

But I do not know how to ignore the child property bbb.

I tried await VerifyJson(result).IgnoreMember("aaa.bbb") but it doesn't work

{
   "aaa": {
     "bbb": "1111"
   }
}