First prototype
diff --git a/inc/Gtfs/Frequency_ScheduleType.php b/inc/Gtfs/Frequency_ScheduleType.php
new file mode 100644
index 0000000..679bb8c
--- /dev/null
+++ b/inc/Gtfs/Frequency_ScheduleType.php
@@ -0,0 +1,16 @@
+<?php
+# Generated by the protocol buffer compiler. DO NOT EDIT!
+# source: proto/gtfs.proto
+
+namespace Gtfs;
+
+if (false) {
+ /**
+ * This class is deprecated. Use Gtfs\Frequency\ScheduleType instead.
+ * @deprecated
+ */
+ class Frequency_ScheduleType {}
+}
+class_exists(Frequency\ScheduleType::class);
+@trigger_error('Gtfs\Frequency_ScheduleType is deprecated and will be removed in the next major release. Use Gtfs\Frequency\ScheduleType instead', E_USER_DEPRECATED);
+