static void logParseError( String key, String value, RuntimeException ex, boolean severe ) {
		String message = "FlatLaf: Failed to parse: '" + key + '=' + value + '\'';
		if( severe )
			LoggingFacade.INSTANCE.logSevere( message, ex );
		else
			LoggingFacade.INSTANCE.logConfig( message, ex );
	}
Similar to Class.getSimpleName(), but includes enclosing class for nested classes.
flatlaf-core/src/main/java/com/formdev/flatlaf/UIDefaultsLoader.java