public com.google.protobuf.TimestampOrBuilder getRdbSnapshotStartTimeOrBuilder() {
        if (rdbSnapshotStartTimeBuilder_ != null) {
          return rdbSnapshotStartTimeBuilder_.getMessageOrBuilder();
        } else {
          return rdbSnapshotStartTime_ == null
              ? com.google.protobuf.Timestamp.getDefaultInstance()
              : rdbSnapshotStartTime_;
        }
      }
<pre>
Optional. Time that the first snapshot was/will be attempted, and to
which future snapshots will be aligned. If not provided, the current time
will be used.
</pre>

<code>
.google.protobuf.Timestamp rdb_snapshot_start_time = 2 [(.google.api.field_behavior) = OPTIONAL];
</code>
java-valkey/proto-google-cloud-valkey-v1/src/main/java/com/google/cloud/memorystore/v1/PersistenceConfig.java