def _on_timer_no_call(self):
        self.fail('deleted timer callback was called.')
Fits the Oracle Approximating Shrinkage covariance model
dataset/ETHPy150Open pika/pika/tests/unit/select_connection_ioloop_tests.py/IOLoopTimerTestSelect._on_timer_no_call--crossover with--dataset/ETHPy150Open scikit-learn/scikit-learn/sklearn/covariance/shrunk_covariance_.py/OAS.fit