def is_public_domain(self):
<EOL>return bool(self._my_map['<STR_LIT>'])<EOL>
Tests if this asset is in the public domain.

        An asset is in the public domain if copyright is not applicable,
        the copyright has expired, or the copyright owner has expressly
        relinquished the copyright.

        return: (boolean) - ``true`` if this asset is in the public
                domain, ``false`` otherwise. If ``true,``
                ``can_distribute_verbatim(),
                can_distribute_alterations() and
                can_distribute_compositions()`` must also be ``true``.
        raise:  IllegalState - ``is_copyright_status_known()`` is
                ``false``
        *compliance: mandatory -- This method must be implemented.*