private void ensureAdditionalLicensesIsMutable() {
      if (!additionalLicenses_.isModifiable()) {
        additionalLicenses_ = new com.google.protobuf.LazyStringArrayList(additionalLicenses_);
      }
      bitField0_ |= 0x00010000;
    }
<pre>
The metadata key/value pairs to assign to the VM.
</pre>

<code>map&lt;string, string&gt; metadata = 16;</code>
java-vmmigration/proto-google-cloud-vmmigration-v1/src/main/java/com/google/cloud/vmmigration/v1/ComputeEngineTargetDefaults.java