private void buildPartial0(
          com.google.storagetransfer.v1.proto.TransferTypes.AwsS3Data result) {
        int from_bitField0_ = bitField0_;
        if (((from_bitField0_ & 0x00000001) != 0)) {
          result.bucketName_ = bucketName_;
        }
        int to_bitField0_ = 0;
        if (((from_bitField0_ & 0x00000002) != 0)) {
          result.awsAccessKey_ =
              awsAccessKeyBuilder_ == null ? awsAccessKey_ : awsAccessKeyBuilder_.build();
          to_bitField0_ |= 0x00000001;
        }
        if (((from_bitField0_ & 0x00000004) != 0)) {
          result.path_ = path_;
        }
        if (((from_bitField0_ & 0x00000008) != 0)) {
          result.roleArn_ = roleArn_;
        }
        if (((from_bitField0_ & 0x00000010) != 0)) {
          result.cloudfrontDomain_ = cloudfrontDomain_;
        }
        if (((from_bitField0_ & 0x00000020) != 0)) {
          result.credentialsSecret_ = credentialsSecret_;
        }
        result.bitField0_ |= to_bitField0_;
      }
<pre>
An AwsS3Data resource can be a data source, but not a data sink.
In an AwsS3Data resource, an object's name is the S3 object's key name.
</pre>

Protobuf type {@code google.storagetransfer.v1.AwsS3Data}
java-storage-transfer/proto-google-cloud-storage-transfer-v1/src/main/java/com/google/storagetransfer/v1/proto/TransferTypes.java