import { Maybe } from "@tsplus/stdlib/data/Maybe/definition";
import { TRef } from "@effect/core/stm/TRef/definition";
import { STM } from "@effect/core/stm/STM/definition/base";
/**
 * Updates some values of the variable but leaves others alone, returning the
 * old value.
 * @tsplus static effect/core/stm/TRef.Aspects getAndUpdateSome
 * @tsplus pipeable effect/core/stm/TRef getAndUpdateSome
 * @tsplus location "@effect/core/stm/TRef/operations/getAndUpdateSome"
 */
export declare function getAndUpdateSome<A>(pf: (a: A) => Maybe<A>): (self: TRef<A>) => STM<never, never, A>;
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