"'UTF-8'"       | null            | "contentCharset must not be null"
    }

    private static String customJarManifestTask() {
        return '''
            class CustomJarManifest extends org.gradle.jvm.tasks.Jar {
                CustomJarManifest() {
                    super();
                    setManifest(new CustomManifest(getFileResolver()))
                }
            }