Ability to select map keys

It seems that there is no way to select key set from a map element

E.g.

{
    "person" : {
        "name" : "Andrew",
        "age" : 23
    }
}

How to get values [ ‘name’, ‘age’ ] ? Now, expression $.person[*] returns values [ ‘Andrew’, 23 ]

Are there any blockers to implement this feature? If it should be implemented, what is the right syntax? Maybe $.person[$$] or $.person.keys()

@kallestenflo , take a look please

[shaunstone]

$.person[*~] seems to work in the online jsonpath evaluator. (jsonpath.com).

[hf-kklein]

@shaunstone Seems like jsonpath.com is using another implementation of JsonPath, but not this one.