import { Tag } from "@tsplus/stdlib/service/Tag";
import { Layer } from "@effect/core/io/Layer/definition";
/**
 * Flattens nested layers.
 * @tsplus static effect/core/io/Layer.Aspects flatten
 * @tsplus pipeable effect/core/io/Layer flatten
 * @tsplus location "@effect/core/io/Layer/operations/flatten"
 */
export declare function flatten<R2, E2, A>(tag: Tag<Layer<R2, E2, A>>): <R, E>(self: import("../definition").Layer<R, E, import("../definition").Layer<R2, E2, A>>) => import("../definition").Layer<R2 | R, E2 | E, A>;
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