| ========================= |
| The plugin configuration belongs in @PLUGIN@.config. |
| The credentialsPath is required when not using the Spanner emulator. |
| instance = spanner-instance |
| credentialsPath = /path/to/credentials.json |
| `ref-database.spanner.instance` |
| : Optional. The name of the spanner instance. |
| `Default: spanner-instance.` |
| `ref-database.spanner.database` |
| : Optional. The name of the spanner database. |
| `ref-database.spanner.useEmulator` |
| : Optional. Boolean, whether or not to use the [in-memory Cloud Spanner emulator](https://cloud.google.com/spanner/docs/emulator). |
| `ref-database.spanner.credentialsPath` |
| : Required when not using the emulator. The path to Google cloud credentials. |