/**
 * The best font-family to be used in CSS based on the platform:
 * - Windows: Segoe preferred, fallback to sans-serif
 * - macOS: standard system font, fallback to sans-serif
 * - Linux: standard system font preferred, fallback to Ubuntu fonts
 *
 * Note: this currently does not adjust for different locales.
 */
export declare const DEFAULT_FONT_FAMILY: string;