/**
 * 创建 BEM风格的类名
 * bem(block, element, modifier)
 * 比如 hhb-button
 * hhb-button__header
 * hhb-button--primary
 *
 * is-disabled  is-checked
 *
 * */
export declare const createNameSpace: (name?: string) => {
    b: (block?: string) => string;
    e: (element: string) => string;
    m: (modifier: string) => string;
    be: (block: string, element: string) => string;
    em: (element: string, modifier: string) => string;
    bem: (block: string, element: string, modifier: string) => string;
    is: (name: string, state: string | boolean) => string;
};
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