@Override protected Mutable newMutable(int valueCount, int bitsPerValue) { return new GrowableWriter(bitsPerValue, valueCount, acceptableOverheadRatio); }
@Override protected Mutable newMutable(int valueCount, int bitsPerValue) { assert this.bitsPerValue >= bitsPerValue; return PackedInts.getMutable(valueCount, this.bitsPerValue, format); }