public void setDividerVertical(Drawable dividerVertical) {
    if (!isDefaultItemDecoration || mVerticalDividerHeight <= 0) return;

    if (this.mVerticalDivider != dividerVertical) {
      this.mVerticalDivider = dividerVertical;
    }

    if (null == mFamiliarDefaultItemDecoration) {
      addDefaultItemDecoration();
    } else {
      mFamiliarDefaultItemDecoration.setVerticalDividerDrawable(mVerticalDivider);

      if (null != mWrapFamiliarRecyclerViewAdapter) {
        mWrapFamiliarRecyclerViewAdapter.notifyDataSetChanged();
      }
    }
  }