private com.google.protobuf.SingleFieldBuilderV3<
            com.google.cloud.vmmigration.v1.Group,
            com.google.cloud.vmmigration.v1.Group.Builder,
            com.google.cloud.vmmigration.v1.GroupOrBuilder>
        getGroupFieldBuilder() {
      if (groupBuilder_ == null) {
        groupBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.cloud.vmmigration.v1.Group,
                com.google.cloud.vmmigration.v1.Group.Builder,
                com.google.cloud.vmmigration.v1.GroupOrBuilder>(
                getGroup(), getParentForChildren(), isClean());
        group_ = null;
      }
      return groupBuilder_;
    }
<pre>
Required. The update request body.
</pre>

<code>.google.cloud.vmmigration.v1.Group group = 2 [(.google.api.field_behavior) = REQUIRED];
</code>
java-vmmigration/proto-google-cloud-vmmigration-v1/src/main/java/com/google/cloud/vmmigration/v1/UpdateGroupRequest.java