export declare type OutputOptions = "default" | "last";
export declare class Output {
    private _lastBemIt;
    constructor(lastBemIt: BemIt);
    get and(): BemIt;
    out(option?: OutputOptions): string;
}
export default class BemIt {
    private _block;
    private _lastBlockObj;
    private _fullBem;
    constructor(block: string | BemIt);
    get blockString(): string;
    get peek(): string;
    get and(): BemIt;
    el(element: string | undefined | null): BemIt;
    mod(modifier: string | string[] | object | undefined | null): Output;
    out(option?: OutputOptions): string;
}
interface addClassReturn {
    before: (bem: BemIt | Output) => string;
    after: (bem: BemIt | Output) => string;
}
export declare function addClass(name: string | null | undefined): addClassReturn;
export {};
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