map2struct

type Family struct {
	LastName string `mapstructure:"LastName"`
}

type Location struct {
	City string `mapstructure:"City"`
}

type Person struct {
	Name   string
	Age    int
	Emails []string
	Extra  map[string]string
}

type Person2 struct {
	Family    `mapstructure:"Family,squash"`
	Location  `mapstructure:"Location,squash"`
	FirstName string `mapstructure:"FirstName"`
}

type Person3 struct {
	Name string
	Age  int
}