private com.google.protobuf.SingleFieldBuilderV3<
            com.google.cloud.storagebatchoperations.v1.LoggingConfig,
            com.google.cloud.storagebatchoperations.v1.LoggingConfig.Builder,
            com.google.cloud.storagebatchoperations.v1.LoggingConfigOrBuilder>
        getLoggingConfigFieldBuilder() {
      if (loggingConfigBuilder_ == null) {
        loggingConfigBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.cloud.storagebatchoperations.v1.LoggingConfig,
                com.google.cloud.storagebatchoperations.v1.LoggingConfig.Builder,
                com.google.cloud.storagebatchoperations.v1.LoggingConfigOrBuilder>(
                getLoggingConfig(), getParentForChildren(), isClean());
        loggingConfig_ = null;
      }
      return loggingConfigBuilder_;
    }
<pre>
Optional. Logging configuration.
</pre>

<code>
.google.cloud.storagebatchoperations.v1.LoggingConfig logging_config = 9 [(.google.api.field_behavior) = OPTIONAL];
</code>
java-storagebatchoperations/proto-google-cloud-storagebatchoperations-v1/src/main/java/com/google/cloud/storagebatchoperations/v1/Job.java