code: public void setFacesInitializer(FacesInitializer facesInitializer) // TODO who uses this method?
      {
          if (_facesInitializer != null && _facesInitializer != facesInitializer && _servletContext != null)
          {
              _facesInitializer.destroyFaces(_servletContext);
          }
          _facesInitializer = facesInitializer;
          if (_servletContext != null)
          {
              facesInitializer.initFaces(_servletContext);
          }
      }
docs: configure the faces initializer
  
  @param facesInitializer