private function getUpdateOperation()
{
$initialPackage = new Package('foo/bar', '1.0.0.0', 'v1.0.0');
$initialPackage->setSourceUrl('https://github.com/foo/bar.git');
$targetPackage = new Package('foo/bar', '1.0.1.0', 'v1.0.1');
$targetPackage->setSourceUrl('https://github.com/foo/bar.git');
return new UpdateOperation($initialPackage, $targetPackage);
}