docs: public Cluster toCluster() {
  		double[] output = new double[this.sumPoints.length];
  		System.arraycopy(this.sumPoints, 0, output, 0, this.sumPoints.length);
  		for (int i = 0; i < output.length; i++) {
  			output[i] /= this.numPoints;
  		}
  		return new SphereCluster(output, getThreshold(), this.numPoints);
  	}