@java.lang.Override
    public com.google.storagetransfer.v1.proto.TransferTypes.AwsS3Data getAwsS3DataSource() {
      if (dataSourceCase_ == 2) {
        return (com.google.storagetransfer.v1.proto.TransferTypes.AwsS3Data) dataSource_;
      }
      return com.google.storagetransfer.v1.proto.TransferTypes.AwsS3Data.getDefaultInstance();
    }
<pre>
An AWS S3 data source.
</pre>

<code>.google.storagetransfer.v1.AwsS3Data aws_s3_data_source = 2;</code>

@return The awsS3DataSource.
java-storage-transfer/proto-google-cloud-storage-transfer-v1/src/main/java/com/google/storagetransfer/v1/proto/TransferTypes.java