public Builder setHdfsDataSource(
          com.google.storagetransfer.v1.proto.TransferTypes.HdfsData.Builder builderForValue) {
        if (hdfsDataSourceBuilder_ == null) {
          dataSource_ = builderForValue.build();
          onChanged();
        } else {
          hdfsDataSourceBuilder_.setMessage(builderForValue.build());
        }
        dataSourceCase_ = 20;
        return this;
      }
<pre>
An HDFS cluster data source.
</pre>

<code>.google.storagetransfer.v1.HdfsData hdfs_data_source = 20;</code>
java-storage-transfer/proto-google-cloud-storage-transfer-v1/src/main/java/com/google/storagetransfer/v1/proto/TransferTypes.java