Nested/joined response/structure

[strarsis]

I have a categories endpoint in FeathersJS. The categories are nested.
Is it possible to return the categories as this nested structure? It would be directly usable by the apps that consume that API:

[
  {
    name: "Main category 1"
    subCategories: [
      { name: "Sub category 1" },
      { name: "Sub category 2" },
      { name: "Sub category 3" }
    ]
  },
  {
    name: "Main category 2"
    subCategories: [
      { name: "Sub category 4" },
      { name: "Sub category 5" },
      { name: "Sub category 6" }
    ]
  }
]