public static com.google.cloud.telcoautomation.v1.OperationMetadata parseDelimitedFrom(
      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
      throws java.io.IOException {
    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(
        PARSER, input, extensionRegistry);
  }
<pre>
Output only. API version used to start the operation.
</pre>

<code>string api_version = 7 [(.google.api.field_behavior) = OUTPUT_ONLY];</code>

@return The bytes for apiVersion.
java-telcoautomation/proto-google-cloud-telcoautomation-v1/src/main/java/com/google/cloud/telcoautomation/v1/OperationMetadata.java