export declare function moveElement<T>(array: T[], oldIndex: number, newIndex: number): T[];
export declare const sumArray: (values: number[]) => number;
export declare const findWithIndex: <T>(arr: T[], predicate: (value: T, index: number, arr: T[]) => boolean) => {
    item: T;
    index: number;
} | {
    index: number;
    item: undefined;
};
