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-rw-r--r--digital/io-hub/src/apbirthday/top.hh4
1 files changed, 4 insertions, 0 deletions
diff --git a/digital/io-hub/src/apbirthday/top.hh b/digital/io-hub/src/apbirthday/top.hh
index 229c909b..09bb9ce0 100644
--- a/digital/io-hub/src/apbirthday/top.hh
+++ b/digital/io-hub/src/apbirthday/top.hh
@@ -43,4 +43,8 @@ top_update ();
bool
top_fsm_gen_event ();
+/// Lauch follow the cake demo mode.
+void
+top_demo_follow (int dir_sign);
+
#endif // top_hh