anchor.diff:  
   | 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).
   
  
positive.code:   "elephantsql": [
      {
        "name": "elephantsql-binding-c6c60",
        "binding_name": "elephantsql-binding-c6c60",
        "instance_name": "elephantsql-c6c60",
        "label": "elephantsql",
        "tags": [
  
negative.code:       "plan": "turtle",
        "credentials": {
          "uri": "postgres://exampleuser:examplepass@babar.elephantsql.com:5432/exampleuser"
        },
        "syslog_drain_url": null,
        "volume_mounts": []
      }
    ],
    "sendgrid": [
      {
        "name": "mysendgrid",
        "binding_guid": "6533b1b6-7916-488d-b286-ca33d3fa0081",
        "binding_name": null,
        "instance_guid": "8c907d0f-ec0f-44e4-87cf-e23c9ba3925d",
        "instance_name": "mysendgrid",
        "label": "sendgrid",
        "tags": [
  