import { TPriorityQueue } from "@effect/core/stm/TPriorityQueue/definition";
import { USTM } from "@effect/core/stm/STM/definition/base";
import { Maybe } from "@tsplus/stdlib/data/Maybe/definition";
/**
 * Takes a value from the queue, returning `None` if there is not a value in
 * the queue.
 * @tsplus getter effect/core/stm/TPriorityQueue takeMaybe
 * @tsplus location "@effect/core/stm/TPriorityQueue/operations/takeMaybe"
 */
export declare function takeMaybe<A>(self: TPriorityQueue<A>): USTM<Maybe<A>>;
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