export type EmitterCallback = (...args: any[]) => void;
export type EmitterUnsubscribe = VoidFunction;
export declare class Emitter<T = string> {
    private _m;
    emit(name: T, ...data: any[]): void;
    off(name: T, callback: EmitterCallback): void;
    on(name: T, callback: EmitterCallback): () => void;
}
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