anchor.diff:  func testAccComputeInstanceTemplate_networkTier(suffix string) string {
   	return fmt.Sprintf(`
   data "google_compute_image" "my_image" {
  -  family  = "debian-9"
  +  family  = "debian-11"
     project = "debian-cloud"
   }
   
  
positive.code: func testAccComputeInstanceTemplate_disks(suffix string) string {
  	return fmt.Sprintf(`
  data "google_compute_image" "my_image" {
    family  = "debian-9"
    project = "debian-cloud"
  }
  
  
negative.code: func testAccComputeInstanceTemplate_resourcePolicies(suffix string, policyName string) string {
  	return fmt.Sprintf(`
  data "google_compute_image" "my_image" {
    family  = "debian-11"
    project = "debian-cloud"
  }
  resource "google_compute_instance_template" "foobar" {
  