code: def _ParseBooleanValue(self, byte_stream):
      
      if byte_stream == b'\x00':
        return False
  
      if byte_stream == b'\x01':
        return True
  
      raise errors.ParseError('Unsupported boolean value.')
docs: Parses a boolean value.
  
      Args:
        byte_stream (bytes): byte stream.
  
      Returns:
        bool: boolean value.
  
      Raises:
        ParseError: when the boolean value cannot be parsed.