else if(v == 254) return UnsignedLong.valueOf(readLong(8));
else throw new NestableRuntimeException("assertion failed, should NOT reach here");
}
public StringColumn readLengthCodedString() throws IOException {
final UnsignedLong length = readUnsignedLong();
return length == null ? null : readFixedLengthString(length.intValue());
}