docs: static String getDefaultNameFromClass(Class<?> cls) {
          String fromCache = defaultNameCache.get(cls);
          if (fromCache != null) {
              return fromCache;
          }
          // generate the default
          // default HystrixCommandKey to use if the method is not overridden
          String name = cls.getSimpleName();
          if (name.equals("")) {
              // we don't have a SimpleName (anonymous inner class) so use the full class name
              name = cls.getName();
              name = name.substring(name.lastIndexOf('.') + 1, name.length());
          }
          defaultNameCache.put(cls, name);
          return name;
      }