docs: protected void determineNumberOfClusters() {
          if (!m_numberOfClustersDetermined
                  && (m_cobwebTree != null)) {
              int[] numClusts = new int[1];
              numClusts[0] = 0;
              //  try {
              m_cobwebTree.assignClusterNums(numClusts);
              // }
              // catch (Exception e) {
  //	e.printStackTrace();
  //	numClusts[0] = 0;
              // }
              m_numberOfClusters = numClusts[0];
  
              m_numberOfClustersDetermined = true;
          }
      }