- // We need to use the SupportActionBar from android.support.v7.app.ActionBar until the minimum API is >= 21.
- Toolbar aboutAppBar = (Toolbar) findViewById(R.id.about_toolbar);
+ // `SupportActionBar` from `android.support.v7.app.ActionBar` must be used until the minimum API is >= 21.
+ Toolbar aboutAppBar = findViewById(R.id.about_toolbar);