import { Maybe } from "@tsplus/stdlib/data/Maybe/definition";
import { TSet } from "@effect/core/stm/TSet/definition";
import { STM } from "@effect/core/stm/STM/definition/base";
/**
 * Takes the first matching value, or retries until there is one.
 * @tsplus static effect/core/stm/TSet.Aspects takeFirst
 * @tsplus pipeable effect/core/stm/TSet takeFirst
 * @tsplus location "@effect/core/stm/TSet/operations/takeFirst"
 */
export declare function takeFirst<A, B>(pf: (a: A) => Maybe<B>): (self: TSet<A>) => STM<never, never, B>;
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