PROTON-2195: Introduce stub pn_event_batch_connection_driver for backward ABI compat
diff --git a/c/src/core/connection_driver.c b/c/src/core/connection_driver.c
index 57fe64d..5947338 100644
--- a/c/src/core/connection_driver.c
+++ b/c/src/core/connection_driver.c
@@ -176,3 +176,6 @@
 }
 
 pn_connection_driver_t** pn_connection_driver_ptr(pn_connection_t *c) { return &c->driver; }
+
+/* Backwards ABI compatability hack - this has been removed because it can't be used sanely */
+PN_EXTERN pn_connection_driver_t *pn_event_batch_connection_driver(pn_event_batch_t *b) { return NULL; }