public int getMetadataCount() {
    return internalGetMetadata().getMap().size();
  }
<pre>
Output only. The VM Boot Option, as set in the source vm.
</pre>

<code>
.google.cloud.vmmigration.v1.ComputeEngineBootOption boot_option = 15 [(.google.api.field_behavior) = OUTPUT_ONLY];
</code>

@return The bootOption.
java-vmmigration/proto-google-cloud-vmmigration-v1/src/main/java/com/google/cloud/vmmigration/v1/ComputeEngineTargetDefaults.java