| 1 | /**
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| 2 | * Returns the element at a specified index in a sequence or undefined if the index is out of range.
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| 3 | * @param {Iterable<T>} source The source sequence.
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| 4 | * @param {number} index The zero-based index of the element to retrieve.
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| 5 | * @return {T} undefined if the index is outside the bounds of the source sequence; otherwise, the element at the
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| 6 | * specified position in the source sequence.
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| 7 | */
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| 8 | export declare function elementAt<T>(source: Iterable<T>, index: number): T | undefined;
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