anchor.diff:    "elephantsql": [
       {
         "name": "elephantsql-binding-c6c60",
  +      "binding_guid": "44ceb72f-100b-4f50-87a2-7809c8b42b8d",
         "binding_name": "elephantsql-binding-c6c60",
  +      "instance_guid": "391308e8-8586-4c42-b464-c7831aa2ad22",
         "instance_name": "elephantsql-c6c60",
         "label": "elephantsql",
         "tags": [
  
positive.code:         "hostname": "smtp.sendgrid.net",
          "username": "QvsXMbJ3rK",
          "password": "HCHMOYluTv"
        }
      }
    ]
  }
  
negative.code: 
  | Attribute | Description |
  | --------- | ----------- |
  | `binding_guid` | The guid of the service binding. |
  | `binding_name` | The name assigned to the service binding by the user. |
  | `instance_guid` | The guid of the service instance. |
  | `instance_name` | The name assigned to the service instance by the user. |
  | `name` | The `binding_name`, if it exists. Otherwise, the `instance_name`. |
  | `label` | The name of the service offering. |
  | `tags` | An array of strings an app can use to identify a service instance. |
  | `plan` | The service plan selected when the service instance was created. |
  | `credentials` | A JSON object containing the service-specific credentials needed to access the service instance. |
  | `syslog_drain_url` | The service-specific syslog drain url. |
  | `volume_mounts` | An array of service-specific volume mounts. |
  
  
  To see the value of the `VCAP_SERVICES` environment variable for an app pushed to <%= vars.app_runtime_abbr %>, see [View Environment Variable Values](#view-env).
  
  