@property
    def K(self):
        return self._K
Don't load templates if their name start with a prefix from
dataset/ETHPy150Open rlabbe/filterpy/filterpy/kalman/square_root.py/SquareRootKalmanFilter.K--crossover with--dataset/ETHPy150Open mozilla/addons-server/src/olympia/lib/template_loader.py/Loader._valid_template