def store(self, out, comments=None):
        """
        Write the `Properties` object's entries (in unspecified order) in
        ``.properties`` format to ``out``, including the current timestamp.

        :param out: A file-like object to write the properties to.  It must
            have been opened as a text file with a Latin-1-compatible encoding.
        :param comments: If non-`None`, ``comments`` will be written to ``out``
            as a comment before any other content
        :type comments: text string or `None`
        :return: `None`
        """
        dump(self.data, out, comments=comments)