export type NonEmpty<X> = [X, ...X[]];
export type NonEmptyReadonly<X> = readonly [X, ...(readonly X[])];
export declare function isNonEmpty<X>(array: readonly X[]): array is NonEmptyReadonly<X>;
export declare function isNonEmpty<X>(array: X[]): array is NonEmpty<X>;
export declare function isEmpty(array: readonly unknown[]): array is readonly [];
export declare function isEmpty(array: unknown[]): array is [];
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