Typed yield expression in MobX-State-Tree flow

The recommended way to do asynchronous actions in MobX-state-tree (MST) is to use flow, which takes a generator function as first argument in which every promise should be yielded.

yield expressions are of type any in TypeScript, but is there any way to automatically type a yield expression in MST?

Example

import { flow, types } from "mobx-state-tree";    type Stuff = { id: string; name: string };    function fetchStuff(): Promise<Stuff[]> {    return new Promise((resolve) => {      resolve([        { id: "1", name: "foo" },        { id: "2", name: "bar" }      ]);    });  }    const Thing = types.model({    id: types.identifier,    name: types.string  });    const ThingStore = types    .model({      things: types.array(Thing)    })    .actions((self) => ({      fetchThings: flow(function* () {        // "stuff" is of type "any"!        const stuff = yield fetchStuff();        self.things.replace(stuff);      })    }));  

from Recent Questions - Stack Overflow https://stackoverflow.com/questions/65374057/typed-yield-expression-in-mobx-state-tree-flow Tholle