import { ROSet } from "@effect-ts-app/core/Prelude";
import { Refinement, Predicate } from "@fp-ts/data/Predicate";
import { Option } from "../../Prelude.js";
export declare function find_<A, B extends A>(as: ROSet<A>, refinement: Refinement<A, B>): B | undefined;
export declare function find_<A>(set: ROSet<A>, predicate: Predicate<A>): A | undefined;
export declare function findFirst_<A, B extends A>(set: ROSet<A>, refinement: Refinement<A, B>): Option<B>;
export declare function findFirst_<A>(set: ROSet<A>, predicate: Predicate<A>): Option<A>;
export declare function findFirstMap_<A, B>(set: ROSet<A>, f: (a: A) => Option<B>): Option<B>;
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