# Fx.FlatMapEffectLike

Describes a dual flattening operator whose callback returns an Effect.

## Signatures

```ts
export type FlatMapEffectLike<Args extends ReadonlyArray<any> = [
]> = {
    <A, B, E2, R2>(f: (a: A) => Effect.Effect<B, E2, R2>, ...args: Args): <E, R>(self: Fx<A, E, R>) => Fx<B, E | E2, R | R2 | Scope.Scope>;
    <A, E, R, B, E2, R2>(self: Fx<A, E, R>, f: (a: A) => Effect.Effect<B, E2, R2>, ...args: Args): Fx<B, E | E2, R | R2 | Scope.Scope>;
};
```

## Why

The shared type gives Effect-producing merge, concat, switch, and exhaust
operators the same data-first and data-last surface while retaining callback
errors and services in the returned Fx.

## Ownership and lifetime

The type acquires no resources. Implementations adapt each Effect to a
one-value Fx whose execution is owned by the returned Fx's required `Scope`.