'Jackson: get the property name where the object is placed

I am trying to deserialize a JSON file, but I got the situation that I have to know which property is placed my deserializing object.

Look at this example:

{
    ...(other properties)...
    "myPropertyName": {
        "foo": "bar",
        "baz": 123
    }
}

And I want to know what is the property name where the object is placed (in this case, "myPropertyName"):

class MyObject {
    @SomeAnnotation?
    private String propertyName; // should get myPropertyName
    private String foo; // bar
    private Integer baz; // 123
    // ...getters, setters...
}

Any guest?

EDIT: If helps to understand, think I'm deserializing a Map, and the json above is stored in rootStr variable:

new ObjectMapper().readValue(rootStr, new TypeReference<HashMap<String, MyObject>>() {})
javajackson


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