@Override
            public void run(Throwable cause) {
                if (ctx.eventLoop().inEventLoop()) {
                    try (SafeCloseable ignored = RequestContextUtil.pop()) {
                        close(cause);
                    }
                } else {
                    ctx.eventLoop().withoutContext().execute(() -> close(cause));
                }
            }
This method is called when the delegate is completed.
core/src/main/java/com/linecorp/armeria/client/HttpResponseWrapper.java