/** The slice of `OBC.Event` the placement core uses, so a non-OBC host can supply its own. */
export interface PlacementEvent<T> {
    add(listener: (data: T) => void): void;
    remove(listener: (data: T) => void): void;
    trigger(data: T): void;
    reset(): void;
}
export declare function createPlacementEvent<T>(): PlacementEvent<T>;
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