import { Either } from "@tsplus/stdlib/data/Either/definition";
/**
 * Self embed `Either<E, A>` into `Either<E, Either<E, A>>`.
 * @tsplus getter Either duplicate
 * @tsplus location "@tsplus/stdlib/data/Either/duplicate"
 */
export declare function duplicate<E, A>(self: Either<E, A>): Either<E, Either<E, A>>;
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