def committee_object(self):
if '<STR_LIT>' in self:<EOL><INDENT>_id = self['<STR_LIT>']<EOL>return self.document._old_roles_committees.get(_id)<EOL><DEDENT>else:<EOL><INDENT>return self<EOL><DEDENT>
If the committee id no longer exists in mongo for some reason,
        this function returns None.