public static Builder newBuilder() {
        return new Builder();
    }
@Test
    void testNotThrowExceptionWhenJarFileIsNull() throws Exception {
        PackagedProgram.newBuilder()
                .setUserClassPaths(
                        Collections.singletonList(
                                new File(CliFrontendTestUtils.getTestJarPath()).toURI().toURL()))
                .setEntryPointClassName(TEST_JAR_MAIN_CLASS);
    }