env

type Env interface {
	GetInt(k string, def ...int) (int, error)
	GetString(k string, def ...string) (string, error)
	GetBool(k string, def ...bool) (bool, error)
	GetStringArr(k string, def ...[]string) ([]string, error)
	GetIntArr(k string, def ...[]int) ([]int, error)
	Dump() (string, error)
}