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

<code>.google.storagetransfer.v1.LoggingConfig logging_config = 14;</code>
java-storage-transfer/proto-google-cloud-storage-transfer-v1/src/main/java/com/google/storagetransfer/v1/proto/TransferTypes.java