code: protected void determineWhetherToAddScis(ServletContainerInitializer sci, List<ServletContainerInitializer> scis) {
        // SCIs from DS are already added      
  
        if (acceptAnnotationsFrom(sci.getClass().getName(), DO_ACCEPT_PARTIAL, DO_NOT_ACCEPT_EXCLUDED)) {
            scis.add(sci);
        }
    }
docs: Tell if servlet-container-initializer (SCI) annotation processing is to be done on the
  class of a specified initializer.  Provide the answer as a side effect.  If processing
  is to be done, add the initializer to the specified initializer list.  If processing is
  not to be done, do not add the initializer.
  
  @param sci The candidate servlet container initializer.
  @param scis Storage for initializers which are to be processed.