export declare const toSnakeCase: (str: string) => string;
export declare const toCamelCase: (str: string) => string;
export declare const ucfirst: (str: string) => string;
export declare const ucwords: (str: string) => string;
export declare const padZero: (n: number) => string;
export declare const isoFormatDate: (date: Date) => string;