1 | import { IterableX } from '../../iterable/iterablex';
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2 | /**
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3 | * @ignore
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4 | */
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5 | export declare function singleProto<T, S extends T>(this: IterableX<T>, predicate: (value: T, index: number) => value is S): S | undefined;
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6 | export declare function singleProto<T>(this: IterableX<T>, predicate?: (value: T, index: number) => boolean): T | undefined;
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7 | declare module '../../iterable/iterablex' {
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8 | interface IterableX<T> {
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9 | single: typeof singleProto;
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10 | }
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11 | }
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