def _convert_x(self, field, recformat):

        dummy = np.zeros(self.shape + (recformat.repeat,), dtype=np.bool_)
        _unwrapx(field, dummy, recformat.repeat)
        return dummy
Convert a raw table column to a bit array as specified by the
dataset/ETHPy150Open spacetelescope/PyFITS/pyfits/fitsrec.py/FITS_rec._convert_x