final PosSize psz = guessNextBGZFPos(cp, firstBGZFEnd); if (psz == null) return end;
final PosSize psz = guessNextBGZFPos(cp, firstBGZFEnd); if (psz == null) return end;
final PosSize psz = guessNextBGZFPos(cp, firstBGZFEnd); if (psz == null) return end;