export declare function SandboxRuntime({ children }: React.PropsWithChildren): string | number | bigint | boolean | Iterable<import("react").ReactNode> | Promise<string | number | bigint | boolean | import("react").ReactPortal | import("react").ReactElement<unknown, string | import("react").JSXElementConstructor<any>> | Iterable<import("react").ReactNode> | null | undefined> | import("react/jsx-runtime").JSX.Element | null | undefined;