import { TestAnnotation } from "@effect/core/testing/TestAnnotation/definition";
import { Effect } from "@effect/core/io/Effect/definition";
import { Annotations } from "@effect/core/testing/Annotations/definition";
/**
 * Accesses an `Annotations` instance in the environment and appends the
 * specified annotation to the annotation map.
 * @tsplus static effect/core/testing/Annotations.Ops annotate
 * @tsplus location "@effect/core/testing/Annotations/operations/annotate"
 */
export declare function annotate<V>(key: TestAnnotation<V>, value: V): Effect<Annotations, never, void>;
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