parameters: (self)
docstring: Serializes the protocol message to a binary string.
  
      This method is similar to SerializeToString but doesn't check if the
      message is initialized.
  
      Returns:
        A string representation of the partial message.
docstring_summary: Serializes the protocol message to a binary string.
docstring_tokens: Serializes the protocol message to a binary string .
function: def SerializePartialToString(self):
      """Serializes the protocol message to a binary string.
  
      This method is similar to SerializeToString but doesn't check if the
      message is initialized.
  
      Returns:
        A string representation of the partial message.
      """
      raise NotImplementedError
function_tokens: def SerializePartialToString ( self ) : raise NotImplementedError