export declare class EventEmitter {
    private readonly listeners;
    emit(eventName: string, ...args: any[]): boolean;
    on(eventName: string, listener: (...args: any[]) => void): this;
    off(eventName: string, listener: (...args: any[]) => void): this;
    once(eventName: string, listener: (...args: any[]) => void): this;
}
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