Interface OverlayManager

interface OverlayManager {
    add(
        overlay: Overlay,
        options?: { fit?: boolean; key?: string; persistent?: boolean },
    ): OverlayHandle | null;
    clear(): void;
    get(key: string): OverlayHandle | undefined;
    off(event: string, handler: (...args: any[]) => void): void;
    on(
        event: "overlay_hover",
        handler: (
            item: OverlayItemEvent | null,
            screenPosition: { x: number; y: number },
        ) => void,
    ): void;
    on(event: "overlay_click", handler: (item: OverlayItemEvent) => void): void;
    on(
        event: "overlay_stale",
        handler: (
            info: {
                boundVersion: string;
                loadedVersion: string;
                overlayId: string;
            },
        ) => void,
    ): void;
    remove(key: string): void;
}