code: public <T> T getService (Class<T> sclass)
      {
          if (_bstrap == null) {
              return null;
          }
          int scount = _bstrap.services.size();
          for (int ii = 0; ii < scount; ii++) {
              InvocationService<?> service = _bstrap.services.get(ii);
              if (sclass.isInstance(service)) {
                  return sclass.cast(service);
              }
          }
          return null;
      }
docs: Returns the first bootstrap service that could be located that implements the supplied
  {@link InvocationService} derivation.  <code>null</code> is returned if no such service
  could be found.