docs: public ApproximateHistogram copy(ApproximateHistogram h)
    {
      if (h.size > this.size) {
        this.size = h.size;
        this.positions = new float[size];
        this.bins = new long[size];
      }
  
      System.arraycopy(h.positions, 0, this.positions, 0, h.binCount);
      System.arraycopy(h.bins, 0, this.bins, 0, h.binCount);
      this.min = h.min;
      this.max = h.max;
      this.binCount = h.binCount;
      this.count = h.count;
      return this;
    }