in my code i have

// the JsonObject is of the type com.google.gson

final JsonObject mdata = niceservice.nicemethod();

.nicemethod() returns the following JsonObject
{
    "Customer": {
        "name": "John Doe",
        "gender": "Male"
    },
    "AdditioanInfo": {
        "samplefield1": "sampleValue1",
        "samplefield2": "sampleValue2",
        "samplefield3": "sampleValue3",
        "SubAdditionalInfo": {
            "SubAdditionalInfo1": "SubAdditionalValue1",
            "SubAdditionalInfo2": "SubAdditionalValue2",
            "SubAdditionalInfo3": "SubAdditionalValue3",
            "SubSubInfo": {
                "SubSubInfo1" : "SubSubInfoValue1",
                "SubSubInfo2" : "SubSubInfoValue2",
                "SubSubInfo3" : "SubSubInfoValue3"
            }
        },
        "ExtraInfo": {
            "ExtraInfo1" : "Extravalue1",
            "ExtraInfo2" : "Extravalue2"
        }
    }
}

so far i have tried

final ObjectMapper objMapper = new ObjectMapper().configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false)
ModernCustomer objc = objMapper.readValue(mdata.toString), ModernCustomer.class));

but i do not think this is the right way to do this as it does nothing. considering I am new to java, please kindly educate me to the fullest on how to resolve this issue

Note: usage of 3rd party libraries might be limited due to my org policies.