code: def _ctab_property_block(stream):
      
      line = stream.popleft()
      while line != 'M  END':
          name = line.split()[1]
          yield CtabPropertiesBlockLine(name, line)
          line = stream.popleft()
docs: Process properties block of ``Ctab``.
  
      :param stream: Queue containing lines of text.
      :type stream: :py:class:`collections.deque`
      :return: Tuples of data.
      :rtype: :class:`~ctfile.tokenizer.CtabPropertiesBlockLine`