public static String toString(RedisCommand<?> command, Object... params) {
        if (RedisCommands.AUTH.equals(command)) {
            return "command: " + command + ", params: (password masked)";
        }
        return "command: " + command + ", params: " + LogHelper.toString(params);
    }
@Test
    public void toStringWithNull() {
        assertThat(LogHelper.toString(null)).isEqualTo("null");
    }