import { Uint8ArrayList } from 'uint8arraylist';
declare function concat(source: Iterable<string> | AsyncIterable<string>, options?: {
    type: 'string';
}): Promise<string>;
declare function concat(source: Iterable<string> | AsyncIterable<string>, options?: {
    type: 'buffer';
}): Promise<Uint8ArrayList>;
declare function concat(source: Iterable<Uint8Array | Uint8ArrayList> | AsyncIterable<Uint8Array | Uint8ArrayList>, options?: {
    type: 'buffer';
}): Promise<Uint8ArrayList>;
declare function concat(source: Iterable<Uint8Array | Uint8ArrayList> | AsyncIterable<Uint8Array | Uint8ArrayList>, options: {
    type: 'string';
}): Promise<string>;
export default concat;
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