Actor inheritance possible?

[crishoj]

Imagine a repository of state machines that have some subset of state/event names in common, but at the same time are specialised to handle different things.

Is it possible to specify a Typescript supertype for these machines?

I tried ReturnType<typeof createActor(...)> with a machine definition containing the common states and events, but Typescript is quick to point out that specialised machines are not assignable to the supertype:

• Types of property config are incompatible.
  • Types of property initial are incompatible.
    • Type { type: "COMMON_STATE_1"; } | { type: "COMMON_STATE_2"; } | { type: "SPECIALIZED_STATE_1"; } is not assignable to type { type: "COMMON_STATE_1"; } | { type: "COMMON_STATE_2"; }