public static com.google.cloud.workflows.v1beta.OperationMetadata parseDelimitedFrom(
      java.io.InputStream input) throws java.io.IOException {
    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(PARSER, input);
  }
<pre>
API version used to start the operation.
</pre>

<code>string api_version = 5;</code>

@return The bytes for apiVersion.
java-workflows/proto-google-cloud-workflows-v1beta/src/main/java/com/google/cloud/workflows/v1beta/OperationMetadata.java