type ThemeOption = 'LIGHT' | 'DARK';
/**
 * Get Language
 * @returns language
 */
export declare function getLanguage(): string;
/**
 * Determine if a string is a number
 * @returns boolean
 */
export declare function checkNumber(roomId: string): boolean;
export declare function toTargetTheme(themeOption: ThemeOption): string;
export {};
