docs: public static Class[] convertToTypeArray(Object[] args) {
          if (args == null)
              return null;
          int s = args.length;
          Class[] ans = new Class[s];
          for (int i = 0; i < s; i++) {
              Object o = args[i];
              ans[i] = getClassWithNullAndWrapper(o);
          }
          return ans;
      }