ax/utils/testing/modeling_stubs.py [41:53]:
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    first_metric_name: str = "a", second_metric_name="b"
) -> Observation:
    return Observation(
        features=ObservationFeatures(
            parameters={"x": 2.0, "y": 10.0}, trial_index=np.int64(0)
        ),
        data=ObservationData(
            means=np.array([2.0, 4.0]),
            covariance=np.array([[1.0, 2.0], [3.0, 4.0]]),
            metric_names=[first_metric_name, second_metric_name],
        ),
        arm_name="1_1",
    )
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ax/utils/testing/modeling_stubs.py [57:69]:
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    first_metric_name: str = "a", second_metric_name="b"
) -> Observation:
    return Observation(
        features=ObservationFeatures(
            parameters={"x": 2.0, "y": 10.0}, trial_index=np.int64(0)
        ),
        data=ObservationData(
            means=np.array([2.0, 4.0]),
            covariance=np.array([[1.0, 2.0], [3.0, 4.0]]),
            metric_names=[first_metric_name, second_metric_name],
        ),
        arm_name="1_1",
    )
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