def get_maximum_currency(self):
<EOL>if self._kwargs['<STR_LIT>'] not in ['<STR_LIT>']:<EOL><INDENT>raise errors.IllegalState()<EOL><DEDENT>return self._kwargs['<STR_LIT>']<EOL>
Gets the maximum currency value.

        return: (osid.financials.Currency) - the maximum currency
        raise:  IllegalState - syntax is not a ``CURRENCY``
        *compliance: mandatory -- This method must be implemented.*