docs: protected void overwriteOldCluster(ClusKernel other) {
          this.totalN = other.totalN;
          this.N = other.N;
          //AuxiliaryFunctions.overwriteDoubleArray(this.LS, other.LS);
          //AuxiliaryFunctions.overwriteDoubleArray(this.SS, other.SS);
          assert (LS.length == other.LS.length);
          System.arraycopy(other.LS, 0, LS, 0, LS.length);
          assert (SS.length == other.SS.length);
          System.arraycopy(other.SS, 0, SS, 0, SS.length);
      }