code: protected void diagnoseMultistepList(
        int matchCount,
        int lengthToTest,
        boolean isGlobal)
    {
        if (matchCount > 0)
          {
          System.err.print(
            "Found multistep matches: " + matchCount + ", " + lengthToTest + " length");
          if (isGlobal)
                System.err.println(" (global)");
          else
                System.err.println();
        }
    }
docs: Print out diagnostics about partial multistep evaluation.