import { Effect } from "@effect/core/io/Effect/definition";
import { Either } from "@tsplus/stdlib/data/Either/definition";
/**
 * Performs the specified operation while "zoomed in" on the `Left` case of an
 * `Either`.
 * @tsplus static effect/core/io/Effect.Aspects leftWith
 * @tsplus pipeable effect/core/io/Effect leftWith
 * @tsplus location "@effect/core/io/Effect/operations/leftWith"
 */
export declare function leftWith<R, E, B, A, R1, E1, B1, A1>(f: (effect: Effect<R, Either<E, B>, A>) => Effect<R1, Either<E1, B1>, A1>): (self: Effect<R, E, Either<A, B>>) => Effect<R | R1, E | E1, Either<A1, B1>>;
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