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: config.go
    path of file: ./repos/mayfly-go/server/pkg/config
    
    the code of the file until where you have to start completion: package config

import (
	"flag"
	"fmt"
	"mayfly-go/pkg/logx"
	"mayfly-go/pkg/utils/ymlx"
	"os"
	"path/filepath"
	"strconv"
)

type ConfigItem interface {
	// 验证配置
	Valid()

	// 如果不存在配置值，则设置默认值
	Default()
}

// 配置文件映射对象
var Conf *Config

func Init() {
	configFilePath := flag.String("e", "./config.y
    
func (c *Config) IfBlankDefaultValue() {
	c.Log.Default()
	// 优先初始化log，因为后续的一些default方法中会需要用到。统一日志输出
	logx.Init(logx.Config{
		Level:     c.Log.Level,
		Type:      c.Log.Type,
		AddSource: c.Log.AddSource,
		Filename:  c.Log.File.Name,
		Filepath:  c.Log.File.Path,
		MaxSize:   c.Log.File.MaxSize,
		MaxAge:    c.Log.File.MaxAge,
		Compress:  c.Log.File.Compress,
	})

	c.Server.Default()
	c.Jwt.Default()
	c.Mysql.Default()
	c.Sqlite.Default()
}