code: @Override
      public List getPatternList() {
          ExtensionFactory delegate = this.delegate;
          if (delegate != null)
              return delegate.getPatternList();
          return Collections.emptyList();
      }
docs: /*
  (non-Javadoc)
  
  @see com.ibm.wsspi.webcontainer.extension.ExtensionFactory#getPatternList()