// Due to the uniform distribution of ObjectIds, having less nodes full
// indicates a good chance the total number of children below here
// is less than the MAX_SIZE split point. Get a more accurate count.
MutableObjectId id = new MutableObjectId();
id.fromObjectId(noteOn);
int sz = 0;
for (int cell = 0; cell < 256; cell++) {
NoteBucket b = table[cell];
if (b == null)