Module: allow retrieval of reference detector

src/core/module/Module.cpp

@@ -34,6 +34,12 @@ Detector* Module::get_detector(std::string name) {
     return (*it);
 }
 
+Detector* Module::get_reference() {
+    auto it = find_if(
+        m_detectors.begin(), m_detectors.end(), [](Detector* obj) { return obj->role() == DetectorRole::REFERENCE; });
+    return (*it);
+}
+
 bool Module::has_detector(std::string name) {
     auto it = find_if(m_detectors.begin(), m_detectors.end(), [&name](Detector* obj) { return obj->name() == name; });
     if(it == m_detectors.end()) {

src/core/module/Module.hpp

@@ -134,6 +134,12 @@ namespace corryvreckan {
          */
         Detector* get_detector(std::string name);
 
+        /**
+         * @brief Get the reference detector for this setup
+         * @return Pointer to the reference detector
+         */
+        Detector* get_reference();
+
         /**
          * @brief Check if this module should act on a given detector
          * @param  name Name of the detector to check