in app/src/main/java/com/gu/toolargetool/sample/MainActivity.kt [10:19]
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
if (savedInstanceState == null) {
supportFragmentManager
.beginTransaction()
.add(R.id.container, TestFragment())
.commit()
}
}