import { TRef } from "@effect/core/stm/TRef/definition";
import { STM } from "@effect/core/stm/STM/definition/base";
/**
 * Updates the value of the variable.
 * @tsplus static effect/core/stm/TRef.Aspects update
 * @tsplus pipeable effect/core/stm/TRef update
 * @tsplus location "@effect/core/stm/TRef/operations/update"
 */
export declare function update<A>(f: (a: A) => A): (self: TRef<A>) => STM<never, never, void>;
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