declare type Fiber = any;
export declare function precacheFiberNode(node: Element, placeholder: Element): Fiber;
export declare function updateFiberProps(node: Element, placeholder: Element): void;
export declare let listeningMarker: string;
export declare function preparePortalMount(dom: HTMLElement): void;
export declare let connectFiber: boolean;
export declare function getReactInternals(component: any): any;
export {};