import { THub } from "@effect/core/stm/THub/definition";
import { USTM } from "@effect/core/stm/STM/definition/base";
/**
 * Views the next element in the queue without removing it, retrying if the
 * queue is empty.
 * @tsplus getter ets/THub/TDequeue peek
 * @tsplus location "@effect/core/stm/THub/operations/TDequeue/peek"
 */
export declare function peek<A>(self: THub.TDequeue<A>): USTM<A>;
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