docs: def get(self, attach, *args, **kwargs):
          """
          :param attach: if True, return file as an attachment.
          """
          response = self.make_response(*args, **kwargs)  # type: Response
          response.content_type = self.get_content_type(*args, **kwargs)
  
          if attach:
              filename = self.get_filename(*args, **kwargs)
              if not filename:
                  filename = "file.bin"
              headers = response.headers
              headers.add("Content-Disposition", "attachment", filename=filename)
  
          self.set_cache_headers(response)
          return response