anchor.diff:  
   func testAccComposerEnvironment_softwareCfg(name, network, subnetwork string) string {
   	return fmt.Sprintf(`
  -data "google_composer_image_versions" "all" {
  -}
  -
   resource "google_composer_environment" "test" {
   	name   = "%s"
   	region = "us-central1"
  
positive.code: 		}
  
  		software_config {
  			image_version = data.google_composer_image_versions.all.image_versions[0].image_version_id
  
  			airflow_config_overrides = {
  				core-load_example = "True"
  
negative.code: <% end -%>
  func testAccComposerEnvironment_update(name, network, subnetwork string) string {
  	return fmt.Sprintf(`
  resource "google_composer_environment" "test" {
  	name   = "%s"
  	region = "us-central1"
  