@java.lang.Override
  public java.lang.String getApplianceInfrastructureVersion() {
    java.lang.Object ref = applianceInfrastructureVersion_;
    if (ref instanceof java.lang.String) {
      return (java.lang.String) ref;
    } else {
      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
      java.lang.String s = bs.toStringUtf8();
      applianceInfrastructureVersion_ = s;
      return s;
    }
  }
<pre>
Output only. Appliance OVA version.
This is the OVA which is manually installed by the user and contains the
infrastructure for the automatically updatable components on the appliance.
</pre>

<code>
string appliance_infrastructure_version = 13 [(.google.api.field_behavior) = OUTPUT_ONLY];
</code>

@return The applianceInfrastructureVersion.
java-vmmigration/proto-google-cloud-vmmigration-v1/src/main/java/com/google/cloud/vmmigration/v1/DatacenterConnector.java