public static com.google.storagetransfer.v1.proto.TransferTypes.GoogleServiceAccount parseFrom(
        java.nio.ByteBuffer data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
        throws com.google.protobuf.InvalidProtocolBufferException {
      return PARSER.parseFrom(data, extensionRegistry);
    }
<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