+static void G_GNUC_UNUSED
+sgen_client_binary_protocol_mark (gpointer obj, gpointer vtable, size_t size)
+{
+}
+
+static void G_GNUC_UNUSED
+sgen_client_binary_protocol_scan_begin (gpointer obj, gpointer vtable, size_t size)
+{
+}
+
+static void G_GNUC_UNUSED
+sgen_client_binary_protocol_scan_vtype_begin (gpointer obj, size_t size)
+{
+}
+
+static void G_GNUC_UNUSED
+sgen_client_binary_protocol_scan_process_reference (gpointer obj, gpointer ptr, gpointer value)
+{
+}
+
+static void G_GNUC_UNUSED
+sgen_client_binary_protocol_scan_stack (gpointer thread, gpointer stack_start, gpointer stack_end, int skip_reason)
+{
+}
+
+static void G_GNUC_UNUSED
+sgen_client_binary_protocol_wbarrier (gpointer ptr, gpointer value, gpointer value_vtable)
+{
+}
+