You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: storage_server.go
    path of file: ./repos/im_service/ims
    
    the code of the file until where you have to start completion: /**
 * Copyright (c) 2014-2015, GoBelieve     
 * All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public Lic
    
func initLog() {
	if config.log_filename != "" {
		writer := &lumberjack.Logger{
			Filename:   config.log_filename,
			MaxSize:    1024, // megabytes
			MaxBackups: config.log_backup,
			MaxAge:     config.log_age, //days
			Compress:   false,
		}
		log.SetOutput(writer)
		log.StandardLogger().SetNoLock()
	}

	log.SetReportCaller(config.log_caller)

	level := config.log_level
	if level == "debug" {
		log.SetLevel(log.DebugLevel)
	} else if level == "info" {
		log.SetLevel(log.InfoLevel)
	} else if level == "warn" {
		log.SetLevel(log.WarnLevel)
	} else if level == "fatal" {
		log.SetLevel(log.FatalLevel)
	}
}