docs: def resize(self, size, disk=None):
          """
          Resize the droplet
  
          :param size: a size slug or a `Size` object representing the size to
              resize to
          :type size: string or `Size`
          :param bool disk: Set to `True` for a permanent resize, including
              disk changes
          :return: an `Action` representing the in-progress operation on the
              droplet
          :rtype: Action
          :raises DOAPIError: if the API endpoint replies with an error
          """
          if isinstance(size, Size):
              size = size.slug
          opts = {"disk": disk} if disk is not None else {}
          return self.act(type='resize', size=size, **opts)