Impossible to have a model property be a map from number-like strings to things and to give it an @example?

[fiendish]

Say I want to have a model property be a map from numbers to other things. Presumably that means myProp is type Record, like e.g.

model ModelA {
   myProp: Record<string>;
}

But I'm specifically looking for number-alike keys, such as

{
   myProp: {"0": "foo", "2": "bar"}
}

But it seems like that's impossible? Or it's impossible to give it an @example because the syntax disallows the example keys being provided as strings and integers are not valid property names?

Kinda likewise it seems impossible to declare an interface model that just has numeric keys? Like, how can I declare and @example an interface model that receives

{
    "0": "stuff"
}

?