code: @Override
      public <T extends Event> Stream<T> createStream(String name, KeyFinder<T> finder, ProcessingElement... processingElements) {
          return super.createStream(name, finder, processingElements);
      }
docs: /*
  (non-Javadoc)
  
  @see org.apache.s4.core.App#createStream(java.lang.String, org.apache.s4.base.KeyFinder, org.apache.s4.core.ProcessingElement[])