public static com.google.storagetransfer.v1.proto.TransferTypes.GoogleServiceAccount parseFrom(
        java.io.InputStream input) throws java.io.IOException {
      return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
    }
<pre>
Unique identifier for the service account.
</pre>

<code>string subject_id = 2;</code>

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