/*
* Go is value model, so structs are deep copy!!!
* @author gtowell
* Created: Aug 19, 2021
 */
package main

import "fmt"

type AA struct {
	a1 int
}
type BB struct {
	aa AA
	b1 int
}

func main() {
	b1 := BB{AA{1}, 1}
	b2 := b1
	b2.aa.a1 = 7
	fmt.Printf("B1 %v\n", b1)
	fmt.Printf("B2 %v\n", b2)
}