code: def forward_list(self):
          '''
          adb forward --list
          TODO: not tested
          '''
          version = self.version()
          if int(version[1]) <= 1 and int(version[2]) <= 0 and int(version[3]) < 31:
              raise EnvironmentError("Low adb version.")
          lines = self.run_cmd("forward", "--list").strip().splitlines()
          return [line.strip().split() for line in linesf forward_list(self):
          '''
          adb forward --list
          TODO: not tested
          '''
          version = self.version()
          if int(version[1]) <= 1 and int(version[2]) <= 0 and int(version[3]) < 31:
              raise EnvironmentError("Low adb version.")
          lines = self.run_cmd("forward", "--list").strip().splitlines()
          return [line.strip().split() for line in lines]
docs: adb forward --list
          TODO: not tested