anchor.diff:  							// configuration.
   							Computed:     true,
   							ValidateFunc: validation.StringInSlice([]string{"REGIONAL", "ZONAL"}, false),
  +							Description:  `The availability type of the Cloud SQL instance, high availability (REGIONAL) or single zone (ZONAL).'`,
   						},
   						"backup_configuration": {
   							Type:     schema.TypeList,
  
positive.code: 										Type:         schema.TypeBool,
  										Optional:     true,
  										AtLeastOneOf: backupConfigurationKeys,
  									},
  									"enabled": {
  										Type:         schema.TypeBool,
  										Optional:     true,
  										AtLeastOneOf: backupConfigurationKeys,
  									},
  									"start_time": {
  										Type:     schema.TypeString,
  
negative.code: 			},
  
  			"first_ip_address": {
  				Type:        schema.TypeString,
  				Computed:    true,
  				Description: `The first IPv4 address of any type assigned. This is to support accessing the first address in the list in a terraform output when the resource is configured with a count.`,
  			},
  
  			"public_ip_address": {
  				Type:        schema.TypeString,
  				Computed:    true,
  				Description: `IPv4 address assigned. This is a workaround for an issue fixed in Terraform 0.12 but also provides a convenient way to access an IP of a specific type without performing filtering in a Terraform config.`,
  			},
  
  			"private_ip_address": {
  				Type:        schema.TypeString,
  				Computed:    true,
  				Description: `IPv4 address assigned. This is a workaround for an issue fixed in Terraform 0.12 but also provides a convenient way to access an IP of a specific type without performing filtering in a Terraform config.`,
  			},
  
  			"name": {
  				Type:        schema.TypeString,
  				Optional:    true,
  				Computed:    true,
  				ForceNew:    true,
  				Description: `The name of the instance. If the name is left blank, Terraform will randomly generate one when the instance is first created. This is done because after a name is used, it cannot be reused for up to one week.`,
  			},
  
  			"master_instance_name": {
  				Type:        schema.TypeString,
  				Optional:    true,
  				Computed:    true,
  				ForceNew:    true,
  				Description: `The name of the instance that will act as the master in the replication setup. Note, this requires the master to have binary_log_enabled set, as well as existing backups.`,
  			},
  
  			"project": {
  				Type:        schema.TypeString,
  				Optional:    true,
  				Computed:    true,
  				ForceNew:    true,
  				Description: `The ID of the project in which the resource belongs. If it is not provided, the provider project is used.`,
  			},
  
  			"replica_configuration": {
  