@Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;

        NormalSketch sketch = (NormalSketch) o;

        if (!Arrays.equals(data, sketch.data)) return false;

        return true;
    }
Sketch size.

@return Number of buckets in the sketch.
searchlib/src/main/java/com/yahoo/searchlib/aggregation/hll/NormalSketch.java