code: protected void hookCurtainFinally(FwAssistantDirector assistantDirector) {
          final FwCoreDirection coreDirection = assistantDirector.assistCoreDirection();
          final CurtainFinallyHook hook = coreDirection.assistCurtainFinallyHook();
          if (hook != null) {
              hook.hook(assistantDirector);
          }
      }
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