code: def add_to_buffer(self, content, read_position):
          
          self.read_position = read_position
          if self.read_buffer is None:
              self.read_buffer = content
          else:
              self.read_buffer = content + self.read_buffer
docs: Add additional bytes content as read from the read_position.
  
          Args:
              content (bytes): data to be added to buffer working BufferWorkSpac.
              read_position (int): where in the file pointer the data was read from.