return (addedDelete ? (removedInsert ? 0 : 16) : 0);
int deltaSize = (addedDelete ? (removedInsert ? 0 : 16) : 0); size += deltaSize; return deltaSize;
    public int deleteRow(int left, int right) {        Row row = new Row(left, right);        boolean removedInsert = rowsToInsert.remove(row);        boolean addedDelete = rowsToDelete.add(row);        return (addedDelete ? (removedInsert ? 0 : 16) : 0);    }