constructors

export declare const cons: {
  <A>(): Prism<Chunk.Chunk<A>, readonly [A, Chunk.Chunk<A>]>
  <A, B>(): PolyPrism<Chunk.Chunk<A>, Chunk.Chunk<B>, readonly [A, Chunk.Chunk<A>], readonly [B, Chunk.Chunk<B>]>
}

export declare const head: <A>() => Optional<Chunk.Chunk<A>, A>

export declare const index: <A>(i: number) => Optional<Chunk.Chunk<A>, A>

export declare const tail: <A>() => Optional<Chunk.Chunk<A>, Chunk.Chunk<A>>