public com.google.cloud.visionai.v1.ServerMetadataOrBuilder getServerMetadataOrBuilder() {
      if (serverMetadataBuilder_ != null) {
        return serverMetadataBuilder_.getMessageOrBuilder();
      } else {
        return serverMetadata_ == null
            ? com.google.cloud.visionai.v1.ServerMetadata.getDefaultInstance()
            : serverMetadata_;
      }
    }
<pre>
Output only. Metadata that the server appends to each packet before sending
it to receivers. You don't need to set a value for this field when sending
packets.
</pre>

<code>
.google.cloud.visionai.v1.ServerMetadata server_metadata = 4 [(.google.api.field_behavior) = OUTPUT_ONLY];
</code>
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/PacketHeader.java