import { BEMModifiers } from 'bem-helpers';
export declare type modList = (string | undefined)[];
interface BEMFunction {
    (element?: string, modifiers?: BEMModifiers | modList): string;
    (modifiers?: BEMModifiers | modList): string;
}
export declare const BEM: (blockName: string, styles?: {
    [key: string]: string;
}) => BEMFunction;
export declare function extendClassName(props: {
    className?: string;
}, className?: string): string;
export {};