Builds a list of _HCSINullField with numbered "Reserved" names.

    Takes the same arguments as the ``range`` built-in.

    :returns: list[HCSINullField]

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)
    ]