private com.google.protobuf.MapField<java.lang.String, java.lang.String> internalGetMetadata() {
    if (metadata_ == null) {
      return com.google.protobuf.MapField.emptyMapField(MetadataDefaultEntryHolder.defaultEntry);
    }
    return metadata_;
  }
<pre>
Resource labels to represent user-provided metadata.
</pre>

<code>map&lt;string, string&gt; labels = 24;</code>
java-tpu/proto-google-cloud-tpu-v2/src/main/java/com/google/cloud/tpu/v2/Node.java