code: function() {
  
              var self = this;
              var summary = 
                  self.tableSummaryBuilder(self.groupsSummary,
                                           self.pagesSummary, 
                                           self.total);
              $('#' + self.getId('summary')).html(summary);
  
          }
docs: utility function to build summary.
  
  TODO: this should allow developer to customize!