code: public void addGlobalTagLibConfig(GlobalTagLibConfig globalTagLibConfig) {
          try {
              TldParser tldParser = new TldParser(this, configManager, false, globalTagLibConfig.getClassloader());
  
              if (globalTagLibConfig.getClassloader() == null)
                  loadTldFromJarInputStream(globalTagLibConfig, tldParser);
              else
                  loadTldFromClassloader(globalTagLibConfig, tldParser);
  
              globalTagLibConfigList.add(globalTagLibConfig);
          }
          catch (JspCoreException e) {
              if(com.ibm.ejs.ras.TraceComponent.isAnyTracingEnabled()&&logger.isLoggable(Level.SEVERE)){
                  logger.logp(Level.SEVERE, CLASS_NAME, "addGlobalTagLibConfig", "failed to create TldParser ", e);
              }
          }
      }
docs: add some GlobalTabLibConfig to the global tag libs we know about. If the provided
  config provides a classloader, we will load the TLDs via that class loaders, otherwise the
  JAR URL will be used to find the TLDs.
  
  @param globalTagLibConfig The global tag lib config