export const state: State;
declare class State {
    /**
     * @param {() => any} cb
     */
    subscribe(cb: () => any): void;
    set radius(x: number);
    get radius(): number;
    set borderWidth(x: number);
    get borderWidth(): number;
    set borderColor(x: string);
    get borderColor(): string;
    set fill(x: string);
    get fill(): string;
    #private;
}
export {};