@staticmethod<EOL><INDENT>def metadata_updated_on(item):<DEDENT>
ts = item['<STR_LIT>']<EOL>ts = str_to_datetime(ts)<EOL>return ts.timestamp()<EOL>
Extracts and coverts the update time from a Puppet forge item.

        The timestamp is extracted from 'updated_at' field and converted
        to a UNIX timestamp.

        :param item: item generated by the backend

        :returns: a UNIX timestamp