import { Tag } from "@tsplus/stdlib/service/Tag";
import { Layer } from "@effect/core/io/Layer/definition";
/**
 * Projects out part of one of the services output by this layer using the
 * specified function.
 * @tsplus static effect/core/io/Layer.Aspects project
 * @tsplus pipeable effect/core/io/Layer project
 * @tsplus location "@effect/core/io/Layer/operations/project"
 */
export declare function project<A, B>(tagA: Tag<A>, tagB: Tag<B>, f: (a: A) => B): <RIn, E, ROut>(self: import("../definition").Layer<RIn, E, A | ROut>) => import("../definition").Layer<RIn, E, B>;
//# sourceMappingURL=project.d.ts.map