code: def _parse_box_list(self, output):
          '''
          Remove Vagrant usage for unit testing
          '''
          # Parse box list output
  
          boxes = []
          # initialize box values
          name = provider = version = None
          for timestamp, target, kind, data in self._parse_machine_readable_output(output):
              if kind == 'box-name':
                  # finish the previous box, if any
                  if name is not None:
                      boxes.append(Box(name=name, provider=provider, version=version))
  
                  # start a new box
                  name = data # box name
                  provider = version = None
              elif kind == 'box-provider':
                  provider = data
              elif kind == 'box-version':
                  version = data
  
          # finish the previous box, if any
          if name is not None:
              boxes.append(Box(name=name, provider=provider, version=version))
  
          return boxef _parse_box_list(self, output):
          '''
          Remove Vagrant usage for unit testing
          '''
          # Parse box list output
  
          boxes = []
          # initialize box values
          name = provider = version = None
          for timestamp, target, kind, data in self._parse_machine_readable_output(output):
              if kind == 'box-name':
                  # finish the previous box, if any
                  if name is not None:
                      boxes.append(Box(name=name, provider=provider, version=version))
  
                  # start a new box
                  name = data # box name
                  provider = version = None
              elif kind == 'box-provider':
                  provider = data
              elif kind == 'box-version':
                  version = data
  
          # finish the previous box, if any
          if name is not None:
              boxes.append(Box(name=name, provider=provider, version=version))
  
          return boxes
docs: Remove Vagrant usage for unit testing