def write_nv_graphic_frame_pr(index, name = nil)
      name = "Chart #{index}" unless ptrue?(name)

      @writer.tag_elements('xdr:nvGraphicFramePr') do
        # Write the xdr:cNvPr element.
        write_c_nv_pr( index + 1, name)
        # Write the xdr:cNvGraphicFramePr element.
        write_c_nv_graphic_frame_pr
      end
    end
def write_nv_graphic_frame_pr(index, name = nil)
      name = "Chart #{index}" unless ptrue?(name)

      @writer.tag_elements('xdr:nvGraphicFramePr') do
        # Write the xdr:cNvPr element.
        write_c_nv_pr( index + 1, name)
        # Write the xdr:cNvGraphicFramePr element.
        write_c_nv_graphic_frame_pr
      end
    end
Write the <xdr:nvGraphicFramePr> element.