import type { Fn0 } from "@thi.ng/api";
import type { Transducer } from "./api.js";
export declare function interleave<A, B>(sep: B | Fn0<B>): Transducer<A, A | B>;
export declare function interleave<A, B>(sep: B | Fn0<B>, src: Iterable<A>): IterableIterator<A | B>;
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