code: public static void setDrawerVerticalPadding(View v, int level) {
          int verticalPadding = v.getContext().getResources().getDimensionPixelSize(R.dimen.material_drawer_vertical_padding);
  
          if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
              v.setPaddingRelative(verticalPadding * level, 0, verticalPadding, 0);
          } else {
              v.setPadding(verticalPadding * level, 0, verticalPadding, 0);
          }
      }
docs: helper to set the vertical padding including the extra padding for deeper item hirachy level to the DrawerItems
  this is required because on API Level 17 the padding is ignored which is set via the XML
  
  @param v
  @param level