export declare function hasInternalSlot(root: unknown): boolean;
export type ShadowRootResolver = () => ShadowRoot;
export declare function getShadowRootResolver(node: Node): undefined | ShadowRootResolver;
export declare function setShadowRootResolver(node: Node, fn: ShadowRootResolver | undefined): void;
export declare function isDelegatingFocus(host: HTMLElement): boolean;
export declare function getHost(root: ShadowRoot): Element;
export declare function getShadowRoot(elm: Element): ShadowRoot;
export declare function isSyntheticShadowHost(node: unknown): node is HTMLElement;
export declare function isSyntheticShadowRoot(node: unknown): node is ShadowRoot;
export declare function attachShadow(elm: Element, options: ShadowRootInit): ShadowRoot;
export declare const eventToShadowRootMap: WeakMap<Event, ShadowRoot>;
export declare function SyntheticShadowRoot(): void;
export declare namespace SyntheticShadowRoot {
    var prototype: any;
}
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