@java.lang.Override
    public final Builder setUnknownFields(final com.google.protobuf.UnknownFieldSet unknownFields) {
      return super.setUnknownFields(unknownFields);
    }
<pre>
Output only. API version used to start the operation.
</pre>

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

@param value The bytes for apiVersion to set.
@return This builder for chaining.
java-storageinsights/proto-google-cloud-storageinsights-v1/src/main/java/com/google/cloud/storageinsights/v1/OperationMetadata.java