Added parsing CCCH Config in system info extractor
diff --git a/include/grgsm/misc_utils/extract_system_info.h b/include/grgsm/misc_utils/extract_system_info.h
index 72d87bf..d449cce 100644
--- a/include/grgsm/misc_utils/extract_system_info.h
+++ b/include/grgsm/misc_utils/extract_system_info.h
@@ -56,6 +56,7 @@
       virtual std::vector<int> get_cell_id() = 0;
       virtual std::vector<int> get_mcc() = 0;
       virtual std::vector<int> get_mnc() = 0;
+      virtual std::vector<int> get_ccch_conf() = 0;
       virtual std::vector<int> get_neighbours(int chan_id) = 0;
       virtual void reset() = 0;
     };