initialize static method
Initialize the theme control of the app
Implementation
static void initialize(
{ThemeData? lightThemeData, ThemeData? darkThemeData}) {
if (_initialized) return;
_initialized = true;
if (lightThemeData != null) lightTheme = lightThemeData;
if (darkThemeData != null) darkTheme = darkThemeData;
_initializeUpdater();
}