ttl2-compatible/src/main/java/com/alibaba/ttl/threadpool/agent/TtlExtensionTransformletManager.java [133:154]:
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    static Map<String, TtlTransformlet> childClassLoaderFirstMergeTransformlets(
        Map<ClassLoader, Map<String, TtlTransformlet>> classLoader2Transformlet, ClassLoader classLoader
    ) {
        Map<String, TtlTransformlet> ret = new HashMap<>();

        final ArrayDeque<ClassLoader> chain = new ArrayDeque<>();
        chain.add(classLoader);
        while (classLoader.getParent() != null) {
            classLoader = classLoader.getParent();

            chain.addFirst(classLoader);
        }

        for (ClassLoader loader : chain) {
            final Map<String, TtlTransformlet> m = classLoader2Transformlet.get(loader);
            if (m == null) continue;

            ret.putAll(m);
        }

        return ret;
    }
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ttl-agent/src/main/java/com/alibaba/ttl3/agent/TtlExtensionTransformletManager.java [131:152]:
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    static Map<String, TtlTransformlet> childClassLoaderFirstMergeTransformlets(
            Map<ClassLoader, Map<String, TtlTransformlet>> classLoader2Transformlet, ClassLoader classLoader
    ) {
        Map<String, TtlTransformlet> ret = new HashMap<>();

        final ArrayDeque<ClassLoader> chain = new ArrayDeque<>();
        chain.add(classLoader);
        while (classLoader.getParent() != null) {
            classLoader = classLoader.getParent();

            chain.addFirst(classLoader);
        }

        for (ClassLoader loader : chain) {
            final Map<String, TtlTransformlet> m = classLoader2Transformlet.get(loader);
            if (m == null) continue;

            ret.putAll(m);
        }

        return ret;
    }
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