import { STM } from "@effect/core/stm/STM/definition/base";
import { Maybe } from "@tsplus/stdlib/data/Maybe/definition";
/**
 * Runs an effect when the supplied partial function matches for the given
 * value, otherwise does nothing.
 * @tsplus static effect/core/stm/STM.Ops whenCaseSTM
 * @tsplus location "@effect/core/stm/STM/operations/whenCaseSTM"
 */
export declare function whenCaseSTM<R, E, A, R1, E1, B>(stm: STM<R, E, A>, pf: (a: A) => Maybe<STM<R1, E1, B>>): STM<R | R1, E | E1, Maybe<B>>;
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