type Falsy = undefined | null | false | 0 | '';
export type ClassNames = string | Falsy | ReadonlyArray<ClassNames>;
/** Filters and concatenates any messy list of CSS classNames.
 *
 * All falsy values are neatly skipped.
 */
export declare const classes: (...classNames: ReadonlyArray<ClassNames>) => string;
export type Modifiers = string | Falsy | ReadonlyArray<Modifiers>;
export declare const modifiedClass: (bemClass: string, modifier: Modifiers, extraClass?: string) => string;
export {};