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: vip_table_load.go
    path of file: ./repos/bfe/bfe_config/bfe_route_conf/vip_rule_conf
    
    the code of the file until where you have to start completion: // Copyright (c) 2019 The BFE Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of th
    
func VipRuleConfLoad(filename string) (VipConf, error) {
	var vipConf VipConf

	// load vip config
	var config VipTableConf
	if _, err := config.LoadAndCheck(filename); err != nil {
		return vipConf, err
	}

	// convert from VipTableConf
	vipConf.Version = config.Version
	vipConf.VipMap = make(Vip2Product)
	for product, viplist := range config.Vips {
		for _, vip := range viplist {
			vipConf.VipMap[vip] = product
		}
	}

	return vipConf, nil
}