public void e(String msg, Object... args) {
        NetBareLog.e(mPrefix + msg, args);
    }
Print a error level log in console, format is '[protocol][ip:port]message'.

@param msg The message you would like logged.
@param args Arguments referenced by the format specifiers in the format string.
netbare-core/src/main/java/com/github/megatronking/netbare/NetBareXLog.java