docs: private TestClassResults getResultsForClass(Map<IClass, TestClassResults> flattenedResults,
                                                  ITestResult testResult)
      {
          TestClassResults resultsForClass = flattenedResults.get(testResult.getTestClass());
          if (resultsForClass == null)
          {
              resultsForClass = new TestClassResults(testResult.getTestClass());
              flattenedResults.put(testResult.getTestClass(), resultsForClass);
          }
          return resultsForClass;
      }