@java.lang.Override
    public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
      if (((bitField0_ & 0x00000001) != 0)) {
        output.writeMessage(2, getStartTime());
      }
      getUnknownFields().writeTo(output);
    }
<pre>
Required. The start time of every automated backup in UTC. It must be set
to the start of an hour. This field is required.
</pre>

<code>.google.type.TimeOfDay start_time = 2 [(.google.api.field_behavior) = REQUIRED];</code>
java-valkey/proto-google-cloud-valkey-v1/src/main/java/com/google/cloud/memorystore/v1/AutomatedBackupConfig.java