@java.lang.Override
  public Builder toBuilder() {
    return this == DEFAULT_INSTANCE ? new Builder() : new Builder().mergeFrom(this);
  }
<pre>
The full path name of the MigratingVm to add.
</pre>

<code>string migrating_vm = 2 [(.google.api.resource_reference) = { ... }</code>

@return The bytes for migratingVm.
java-vmmigration/proto-google-cloud-vmmigration-v1/src/main/java/com/google/cloud/vmmigration/v1/AddGroupMigrationRequest.java