}

    /**
     * Test for method interaction.
     * Verifies that unwrap and close can be used in sequence.
     */
    @Test
    void testMethodInteraction() {
        CustomSmbTree customTree = mock(CustomSmbTree.class);
        when(smbTree.unwrap(CustomSmbTree.class)).thenReturn(customTree);
        doNothing().when(smbTree).close();