@java.lang.Override
  public int getBootOptionValue() {
    return bootOption_;
  }
<pre>
The VM Boot Option, as set in the source vm.
</pre>

<code>.google.cloud.vmmigration.v1.ComputeEngineBootOption boot_option = 15;</code>

@return The enum numeric value on the wire for bootOption.
java-vmmigration/proto-google-cloud-vmmigration-v1/src/main/java/com/google/cloud/vmmigration/v1/ComputeEngineTargetDetails.java