export type MiniEmitterCallback<Updated> = (updated: Updated[]) => any;
export declare class MiniEmitter<T = any> {
    private _callbacks;
    constructor();
    onUpdate(callback: MiniEmitterCallback<T>): this;
    offUpdate(callback: MiniEmitterCallback<T>): this;
    protected fireUpdate(updated?: T[]): void;
}
export declare class MiniMapEmitter<T> extends Map<string, T> {
    private _callbacks;
    constructor();
    onUpdate(callback: MiniEmitterCallback<T>): this;
    offUpdate(callback: MiniEmitterCallback<T>): this;
    protected fireUpdate(updated?: T[]): void;
}