public static FilesApplicationPackage fromFile(File appDir) {
        return fromFile(appDir, false);
    }
@Test
    public void testLegacyOverrides() {
        File appDir = new File("src/test/resources/app-legacy-overrides");
        ApplicationPackage app = FilesApplicationPackage.fromFile(appDir);
        var overrides = app.legacyOverrides();
        assertEquals(2, overrides.size());
        assertEquals("something here", overrides.get("foo-bar"));
        assertEquals("false", overrides.get("v7-geo-positions"));
    }