code: public void setToolbar(@NonNull Activity activity, @NonNull Toolbar toolbar) {
          setToolbar(activity, toolbar, false);
      }
docs: Sets the toolbar which should be used in combination with the drawer
  This will handle the ActionBarDrawerToggle for you.
  Do not set this if you are in a sub activity and want to handle the back arrow on your own
  
  @param activity
  @param toolbar  the toolbar which is used in combination with the drawer