import { Spreadable } from "@tsplus/stdlib/utilities/Types";
import { Layer } from "@effect/core/io/Layer/definition";
/**
 * Returns a new layer that produces the outputs of this layer but also
 * passes through the inputs.
 * @tsplus getter effect/core/io/Layer passthrough
 * @tsplus location "@effect/core/io/Layer/operations/passthrough"
 */
export declare function passthrough<RIn extends Spreadable, E, ROut extends Spreadable>(self: Layer<RIn, E, ROut>): Layer<RIn, E, RIn | ROut>;
//# sourceMappingURL=passthrough.d.ts.map