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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def set_as_opus_maximum(self):
 # TODO: test """Mark explicitly the work as the author's opus maximum."""

        if self.is_opus_maximum():
            return False
        else:
            opmax = self._get_opus_maximum()
            self.ecrm_P2_has_type = opmax
            self.update()
            return True