https://docs.cloud.google.com/java/docs/reference/google-cloud-spanner/latest/com.google.spanner.admin.instance.v1.FulfillmentPeriod
Enum FulfillmentPeriod (6.116.0) | Java client libraries | Google Cloud Documentation
java clientgoogle cloudenum
https://docs.cloud.google.com/spanner/docs/reference/rest/v1/FulfillmentPeriod
FulfillmentPeriod | Spanner | Google Cloud Documentation
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