| 1 | import { OptionalFindOptions } from './findoptions';
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| 2 | /**
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| 3 | * Returns the only element of an async-iterable sequence that matches the predicate if specified,
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| 4 | * or undefined if no such element exists; this method reports an exception if there is more
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| 5 | * than one element in the async-iterable sequence.
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| 6 | *
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| 7 | * @export
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| 8 | * @template T The type of the elements in the source sequence.
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| 9 | * @param {AsyncIterable<T>} source Source async-iterable sequence.
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| 10 | * @param {OptionalFindOptions<T>} [options] The optional options which includes a predicate for filtering,
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| 11 | * thisArg for predicate binding and an abort signal for cancellation.
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| 12 | * @returns {(Promise<T | undefined>)} A promise with the single element in the async-iterable sequence that satisfies
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| 13 | * the condition in the predicate, or undefined if no such element exists.
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| 14 | */
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| 15 | export declare function single<T>(source: AsyncIterable<T>, options?: OptionalFindOptions<T>): Promise<T | undefined>;
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