if(summaryMap != null) {
summaryDetails.append("file,util%\n");
Iterator<Map.Entry<Long, FileSummary>> fileItr = summaryMap.entrySet().iterator();
while(fileItr.hasNext()) {
Map.Entry<Long, FileSummary> entry = fileItr.next();
FileSummary fs = entry.getValue();
long bytesUsed = fs.totalSize - fs.getObsoleteSize();
summaryDetails.append(String.format("%s,%f\n",
Long.toHexString(entry.getKey().longValue()),
Utils.safeGetPercentage(bytesUsed, fs.totalSize)));
}
summaryDetails.append(String.format("total,%f\n",