import * as T from "../../../../Effect";
import * as O from "../../../../Option";
import type * as Chunk from "../core";
/**
 * Returns the first element that satisfies the effectful predicate.
 */
export declare function findM_<R, E, A>(self: Chunk.Chunk<A>, f: (a: A) => T.Effect<R, E, boolean>): T.Effect<R, E, O.Option<A>>;
/**
 * Returns the first element that satisfies the effectful predicate.
 */
export declare function findM<R, E, A>(f: (a: A) => T.Effect<R, E, boolean>): (self: Chunk.Chunk<A>) => T.Effect<R, E, O.Option<A>>;
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