code: protected java.util.Map captureStatistics()
      {
          if (Tracing.isAnyTracingEnabled() && trace.isEntryEnabled())
              trace.entry(this, cclass
                          , "captureStatistics"
                              );
  
          java.util.Map statistics = new java.util.HashMap();
  
          String histogram = " ";
          for (int n = 0; n < subMapAccessFrequency.length; n++) {
              histogram += subMapAccessFrequency[n] + " ";
              subMapAccessFrequency[n] = 0;
          }
          statistics.put("subMapAccessFrequency", histogram);
  
          if (Tracing.isAnyTracingEnabled() && trace.isEntryEnabled())
              trace.exit(this, cclass
                         , "captureStatistics"
                         , new Object[] { statistics }
                              );
          return statistics;
      }
docs: /*
  Builds a set of properties containing the current statistics.
  
  @return java.util.Map the statistics.