declare const _default: {
    isEmpty: (s: any) => boolean;
    getNumberValue: (n: any) => number | null;
    getStringValue: (n: any) => string | null;
    sleep: (n: number) => Promise<void>;
    getNumberRegex: (precision: number | null | undefined, allowNegative: boolean) => string;
    isValidNumber: (n: number, precision: number | null | undefined, allowNegative: boolean, max?: number | null, min?: number | null) => boolean;
    formatNumber: (n: number | string | null, precision: number | null | undefined) => string;
    filterFiles: (files: Array<File>, accept: string) => File[];
    getNestedObject: (obj: any, keys: string[]) => any;
    getNestedValue: (data: any, key: string) => any;
};
export default _default;