code: @Override
      public void init (ExtendedProperties config)
      {
          // the web framework was kind enough to slip this into the runtime when it started up
          _sctx = (ServletContext)rsvc.getApplicationAttribute("ServletContext");
          if (_sctx == null) {
              rsvc.getLog().warn("ServletContextResourceLoader: servlet context was not supplied " +
                                 "as application context. A user of the servlet context resource " +
                                 "loader must call Velocity.setApplicationAttribute(" +
                                 "\"ServletContext\", getServletContext()).");
          }
      }
docs: Called by Velocity to initialize this resource loader.