docs: private void lazyClassInit() {
          if (lazyInitDone) return;
          synchronized (lazyInitLock) {
              if (redirect!=null) {
                  throw new GroovyBugError("lazyClassInit called on a proxy ClassNode, that must not happen."+
                                           "A redirect() call is missing somewhere!");
              }   
              if (lazyInitDone) return;
              VMPluginFactory.getPlugin().configureClassNode(compileUnit,this);
              lazyInitDone = true;
          }
      }