Add missing methods stubs - just to write unit tests

core-writer/src/ProcessManager.cpp

@@ -105,4 +105,16 @@ void ProcessManager::stop_receiving()
     #endif
 
     recv_module_.stop_recv();
+}
+
+string ProcessManager::get_status()
+{
+    // TODO: Implement status collection.
+    return "nothing to see here";
+}
+
+unordered_map<std::string, float> ProcessManager::get_statistics()
+{
+    // TODO: Implement statistics.
+    return {};
 }