# File lib/ruport/formatter/pdf.rb, line 144
    def build_grouping_body 
      case style
      when :inline
        render_inline_grouping(options.to_hash.merge(:formatter => pdf_writer,
            :skip_finalize_table => true))
      when :justified, :separated
        render_justified_or_separated_grouping
      when :offset
        render_offset_grouping
      else
        raise NotImplementedError, "Unknown style"
      end
    end