def write_sp_pr(col_absolute, row_absolute, width, height, shape = {})
      @writer.tag_elements('xdr:spPr') do
        # Write the a:xfrm element.
        write_a_xfrm(col_absolute, row_absolute, width, height)
        # Write the a:prstGeom element.
        write_a_prst_geom(shape)
      end
    end
def write_sp_pr(col_absolute, row_absolute, width, height, shape = {})
      @writer.tag_elements('xdr:spPr') do
        # Write the a:xfrm element.
        write_a_xfrm(col_absolute, row_absolute, width, height)
        # Write the a:prstGeom element.
        write_a_prst_geom(shape)
      end
    end
Write the <xdr:spPr> element, for charts.