code: public void setFollowParentFocus(final boolean follow) {
          if (follow != mFollowParentFocus) {
              mFollowParentFocus = follow;
              Log.d(Log.SUBSYSTEM.WIDGET, TAG, "setFollowParentFocus(%s): calling registerPickable",
                    getName());
              registerPickable();
          }
      }
docs: This method is nearly identical to
  {@link #setChildrenFollowFocus(boolean)}, with the only difference being
  that the child is independently grouping itself with the parent for
  purposes of managing focus. If either feature is enabled, the child will
  be focused with the parent.
  
  @param follow
  {@code true} to enable this {@link Widget} to follow its
  parent's focus, {@code false} to disable.