}

        @Test
        @DisplayName("unsetFlag should remove specified flags")
        void testUnsetFlag() {
            // Test unsetting an existing flag
            message.flags = DcerpcConstants.RPC_C_PF_BROADCAST | DcerpcConstants.RPC_C_PF_NO_FRAGMENT;
            message.unsetFlag(DcerpcConstants.RPC_C_PF_BROADCAST);

    public void updateChild(String childName, SmbFileAttributes attrs) {
        lock.writeLock().lock();
        try {
            FileInfo existing = children.get(childName);
            FileInfo newInfo = new FileInfo(childName, attrs);
            
            if (existing == null || !existing.matches(attrs)) {
                children.put(childName, newInfo);
                hasChanges = true;

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