import { Cause } from "@effect/core/io/Cause/definition";
/**
 * Squashes a `Cause` down to a single defect, chosen to be the "most
 * important" defect.
 * @tsplus static effect/core/io/Cause.Aspects squashWith
 * @tsplus pipeable effect/core/io/Cause squashWith
 * @tsplus location "@effect/core/io/Cause/operations/squashWith"
 */
export declare function squashWith<E>(f: (e: E) => unknown): (self: Cause<E>) => unknown;
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