public static void setInstance(final PrintStream stream) {
        inst = new LogStream(stream);
    }

    /**
     * Returns the singleton LogStream instance.
     *
     * @return the LogStream instance
     */
    public static LogStream getInstance() {
        if (inst == null) {
            setInstance(System.err);
        }
        return inst;
    }

    }

    private void resetLogStreamInstance() throws Exception {
        // Use reflection to reset the static instance field to null
        Field instanceField = LogStream.class.getDeclaredField("inst");
        instanceField.setAccessible(true);
        instanceField.set(null, null);
    }

    @Test
    void testConstructor() {
        // Test constructor creates a LogStream that extends PrintStream

        }
    }

    private static byte[] deriveKey(final byte[] masterKey, final String cnst) {
        final MessageDigest md5 = Crypto.getMD5();
        md5.update(masterKey);
        md5.update(cnst.getBytes(StandardCharsets.US_ASCII));
        md5.update((byte) 0);
        return md5.digest();
    }

    @Override