Is it possible to provide an x-faker definition for dynamic keys?

[keyboSlice]

I have a schema that looks like:

schema:
  type: object
  additionalProperties:
    type: array
    items:
      $ref: '#/components/schemas/DeliverySlot'

Where each key in the object is a date string e.g.

{
  "2023-03-01": [
    { "start": 10, "end": 12, "available": true }
  ],
  "2023-03-02": [
   { "start": 10, "end": 12, "available": true }
  ]
}

Is it possible to provide an x-faker attribute that would determine how the random property names in the object get generated?

For example I'd like each key in the returned object to be a date string for a date in the future.