docs: private BeanManagerInfo getBeanManagerInfo(ClassLoader cl)
      {
          BeanManagerInfo bmi = bmpSingleton.bmInfos.get(cl);
  
          if (bmi == null)
          {
              synchronized (this)
              {
                  bmi = bmpSingleton.bmInfos.get(cl);
                  if (bmi == null)
                  {
                      bmi = new BeanManagerInfo();
                      bmpSingleton.bmInfos.put(cl, bmi);
                  }
              }
          }
  
          return bmi;
      }