def METHOD_NAME(cls):
    a_std = 2.0
    b_std = 2.0
    # Priors with bias
    a_bias = 0.5 * a_std
    b_bias = -0.5 * b_std
    return cls(
        np.METHOD_NAME.normal(a_true + a_bias, a_std),
        np.METHOD_NAME.normal(b_true + b_bias, b_std),
    )