private com.google.protobuf.SingleFieldBuilderV3<
            com.google.cloud.visionai.v1.Collection,
            com.google.cloud.visionai.v1.Collection.Builder,
            com.google.cloud.visionai.v1.CollectionOrBuilder>
        getCollectionFieldBuilder() {
      if (collectionBuilder_ == null) {
        collectionBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.cloud.visionai.v1.Collection,
                com.google.cloud.visionai.v1.Collection.Builder,
                com.google.cloud.visionai.v1.CollectionOrBuilder>(
                getCollection(), getParentForChildren(), isClean());
        collection_ = null;
      }
      return collectionBuilder_;
    }
<pre>
Required. The collection to update.

The collection's `name` field is used to identify the collection to be
updated. Format:
`projects/{project_number}/locations/{location}/corpora/{corpus}/collections/{collection}`
</pre>

<code>
.google.cloud.visionai.v1.Collection collection = 1 [(.google.api.field_behavior) = REQUIRED];
</code>
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/UpdateCollectionRequest.java