AllocRunArray
static text_run_array* AllocRunArray(int32 entryCount,
runs = BTextView::AllocRunArray(8);
text_run_array* runArray = AllocRunArray(styleRange->count, _size);
text_run_array* copy = AllocRunArray(countDelta, NULL);
text_run_array* runArray = AllocRunArray(count, _size);