code: def raw(self, file_path, ref, streamed=False, action=None, chunk_size=1024,
              **kwargs):
          
          file_path = file_path.replace('/', '%2F').replace('.', '%2E')
          path = '%s/%s/raw' % (self.path, file_path)
          query_data = {'ref': ref}
          result = self.gitlab.http_get(path, query_data=query_data,
                                        streamed=streamed, raw=True, **kwargs)
          return utils.response_content(result, streamed, action, chunk_size)
docs: Return the content of a file for a commit.
  
          Args:
              ref (str): ID of the commit
              filepath (str): Path of the file to return
              streamed (bool): If True the data will be processed by chunks of
                  `chunk_size` and each chunk is passed to `action` for
                  treatment
              action (callable): Callable responsible of dealing with chunk of
                  data
              chunk_size (int): Size of each chunk
              **kwargs: Extra options to send to the server (e.g. sudo)
  
          Raises:
              GitlabAuthenticationError: If authentication is not correct
              GitlabGetError: If the file could not be retrieved
  
          Returns:
              str: The file content