code: def list_suites(suitedir="./testcases/suites", cloud=False):
          
          suites = []
          suites.extend(TestSuite.get_suite_files(suitedir))
  
          # no suitedir, or no suites -> append cloud.get_campaigns()
  
          if cloud:
              names = cloud.get_campaign_names()
              if names:
                  suites.append("------------------------------------")
                  suites.append("FROM CLOUD:")
                  suites.extend(names)
          if not suites:
              return None
  
          from prettytable import PrettyTable
          table = PrettyTable(["Testcase suites"])
          for suite in suites:
              table.add_row([suite])
          return table
docs: Static method for listing suites from both local source and cloud.
          Uses PrettyTable to generate the table.
  
          :param suitedir: Local directory for suites.
          :param cloud: cloud module
          :return: PrettyTable object or None if no test cases were found