def METHOD_NAME(self, fftd):
    if fftd.N != self.fftnum:
        print("Skipping ISBD with wrong fftnum (%u vs %u)\n" % (fftd.fftnum, self.fftnum))
        return
    if self.holes:
        print("Skipping ISBD(%u) for ISBH(%u) with holes in it" % (fftd.seqno, self.fftnum))
        return
    if fftd.seqno != self.seqno+1:
        print("ISBH(%u) has holes in it" % fftd.N)
        self.holes = True
        return
    self.seqno += 1
    self.data["X"].extend(fftd.x)
    self.data["Y"].extend(fftd.y)
    self.data["Z"].extend(fftd.z)