export declare class ManagedStylesheet { private readonly id; constructor(id: string); isMounted(): boolean; mount(css: string): void; unmount(): void; } export declare function createSVG(tag: K, attrs: Record, children?: (SVGElement | false)[]): SVGElementTagNameMap[K]; export declare function createElement(tag: K, attrs: Record, children?: (HTMLElement | SVGSVGElement | Text | string | false)[]): HTMLElementTagNameMap[K]; export declare function measureToString(prop: string | number | undefined): string;