@java.lang.Override
    public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
      if (rdbSnapshotPeriod_
          != com.google.cloud.memorystore.v1beta.PersistenceConfig.RDBConfig.SnapshotPeriod
              .SNAPSHOT_PERIOD_UNSPECIFIED
              .getNumber()) {
        output.writeEnum(1, rdbSnapshotPeriod_);
      }
      if (((bitField0_ & 0x00000001) != 0)) {
        output.writeMessage(2, getRdbSnapshotStartTime());
      }
      getUnknownFields().writeTo(output);
    }
<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-v1beta/src/main/java/com/google/cloud/memorystore/v1beta/PersistenceConfig.java