/**
 * Capitalizes a string's first letter and make other letters lowercased.
 * @private
 */
export declare const capitalize: (str: string) => string;
/**
 * Removes null, undefined and "" from a object
 * @private
 */
export declare const cleanObject: (p: object) => object;
declare type TesterFunction = (item: string) => boolean;
/**
 * @todo Find a better name for this function
 * @private
 */
export declare const arrayTesting: (arr: (string | number)[], tester: TesterFunction, condition: "all" | "some") => boolean;
export {};