public void setDisplayNameOrNull(String displayName) throws IOException {
        setDisplayName(displayName);
    }
@Test
    public void testSetDisplayNameOrNull() throws Exception {
        final String projectName = "projectName";
        final String displayName = "displayName";
        StubAbstractItem i = new StubAbstractItem();
        i.doSetName(projectName);
        assertNull(i.getDisplayNameOrNull());

        i.setDisplayNameOrNull(displayName);
        assertEquals(displayName, i.getDisplayNameOrNull());
        assertEquals(displayName, i.getDisplayName());
    }