* <p>
     * <pre>
     *     jar("path/to/file.jar") {
     *         manifest {  // can be withoutManifest()
     *             mainAttributes.putValue("Multi-Release", "true")
     *         }
     *
     *         entry("Foo.class", fooBytes)
     *         versionedEntry(11, "Foo.class", fooBytesForJava11)
     *     }

            manifest {}

            entry("Foo.class", ORIGINAL_CLASS)
        }

        def transformed = jar(testDir.file("transformed.jar")) {
            withoutManifest()

            entry("Foo.class", INSTRUMENTED_CLASS)
        }

        TransformedClassPath cp = classPath((original): transformed)

        expect: