@Config
    public static PrintStream fallbackLogger()
    {
        final String fallbackLoggerName = getProperty(FALLBACK_LOGGER_PROP_NAME, "stderr");
        switch (fallbackLoggerName)
        {
            case "stdout":
                return System.out;

            case "no_op":
                return NO_OP_LOGGER;

            case "stderr":
            default:
                return System.err;
        }
    }
@Test
    void fallbackLoggerReturnsSystemErrorIfNothingSpecified()
    {
        System.clearProperty(FALLBACK_LOGGER_PROP_NAME);
        assertSame(System.err, CommonContext.fallbackLogger());
    }