CTBreak[] brkArray = new CTBreak[worksheet.getColBreaks().getBrkList().size()];
worksheet.getColBreaks().getBrkList().toArray(brkArray);
int[] breaks = new int[brkArray.length];
for (int i = 0 ; i < brkArray.length ; i++) {
CTBreak brk = brkArray[i];
breaks[i] = (int)brk.getId();
}
return breaks;
}