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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _hcsi_null_range(*args, **kwargs):
 """Builds a list of _HCSINullField with numbered "Reserved" names. Takes the same arguments as the ``range`` built-in. :returns: list[HCSINullField] """

    return [
        HCSINullField('Reserved{:02d}'.format(x))
        for x in range(*args, **kwargs)
    ]