def normalize_coherence(x, dof, copy=True):
    if copy:
        x = x.copy()
    np.arctanh(x, x)
    x *= np.sqrt(dof)
    return x
`_registerClassInstance`: register a `class` instance
dataset/ETHPy150Open nipy/nitime/nitime/utils.py/normalize_coherence--crossover with--dataset/ETHPy150Open ufora/ufora/packages/python/pyfora/PyObjectWalker.py/PyObjectWalker._registerClassInstance