def completed_scans(site_id)
      table = { 'table-id' => 'site-completed-scans' }
      data  = DataTable._get_json_table(self, "/data/scan/site/#{site_id}", table)
      data.map(&CompletedScan.method(:parse_json))
    end
def completed_scans(site_id)
      table = { 'table-id' => 'site-completed-scans' }
      data  = DataTable._get_json_table(self, "/data/scan/site/#{site_id}", table)
      data.map(&CompletedScan.method(:parse_json))
    end
Retrieve a history of the completed scans for a given site.

 @param [FixNum] site_id Site ID to find scans for.
 @return [CompletedScan] details of the completed scans for the site.