export type StringIterable = string | Iterable<string, undefined, undefined> | Iterator<string, undefined, undefined>;
export type AsyncStringIterable = StringIterable | AsyncIterable<string, undefined, undefined> | AsyncIterator<string, undefined, undefined>;
export declare function singleCharactersOf(...its: StringIterable[]): Generator<string, void, unknown>;
export declare function singleCharactersOfAsync(...its: AsyncStringIterable[]): AsyncGenerator<string, void, unknown>;
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