def _graph_title_and_key(self):
    if self.use_opportunities:
        return ['', _('New Opportunities')]
    return super(Team, self)._graph_title_and_key()
def _graph_title_and_key(self):
    if self.use_opportunities:
        return [, _('New Opportunities')]
    return super(Team, self)._graph_title_and_key()