Method flatMap

src/effected.ts:2360–2360

(
    mapper: (value: R) => Generator<F, S, unknown> | Effected<F, S>,
  )

  map<S>(mapper: (value: R) => S): EffectedDraft<P, E, S>;

  flatMap<S, F extends Effect = never>(
    mapper: (value: R) => Generator<F, S, unknown> | Effected<F, S>,
  ): EffectedDraft<P, E | F, S>;