/**
 * Reference to an overlay that has been created with the Overlay service.
 * Used to manipulate or dispose of said overlay.
 */
var OverlayRef = /** @class */ (function () {
    function OverlayRef(_portalHost) {
        this._portalHost = _portalHost;
    }
    OverlayRef.prototype.attach = function (portal, newestOnTop) {
        if (newestOnTop === void 0) { newestOnTop = true; }
        return this._portalHost.attach(portal, newestOnTop);
    };
    /**
     * Detaches an overlay from a portal.
     * @returns Resolves when the overlay has been detached.
     */
    OverlayRef.prototype.detach = function () {
        return this._portalHost.detach();
    };
    return OverlayRef;
}());
export { OverlayRef };
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