docs: protected int getNumFailures(Run<?, ?> build) {
          AbstractTestResultAction a = build.getAction(AbstractTestResultAction.class);
          if (a instanceof AggregatedTestResultAction) {
              int result = 0;
              AggregatedTestResultAction action = (AggregatedTestResultAction) a;
              for (ChildReport cr : action.getChildReports()) {
                  if (cr == null || cr.child == null || cr.child.getParent() == null) {
                      continue;
                  }
                  if (cr.child.getParent().equals(build.getParent())) {
                      if (cr.result instanceof TestResult) {
                          TestResult tr = (TestResult) cr.result;
                          result += tr.getFailCount();
                      }
                  }
              }
  
              if (result == 0 && action.getFailCount() > 0) {
                  result = action.getFailCount();
              }
              return result;
          }
          return a.getFailCount();
      }