Move metadata handle name function upstream to podio

Where it belongs

Author: tmadlener

k4FWCore/include/k4FWCore/MetaDataHandle.h

@@ -11,14 +11,6 @@
 
 #include <type_traits>
 
-namespace k4FWCore {
-
-  static std::string metaDataHandleDescriptor(const std::string& collectionName, const std::string& key) {
-    return collectionName + "__" + key;
-  }
-
-}  // namespace k4FWCore
-
 template <typename T> class MetaDataHandle {
 public:
   MetaDataHandle();
@@ -88,7 +80,7 @@ template <typename T> void MetaDataHandle<T>::put(T value) {
 template <typename T> std::string MetaDataHandle<T>::fullDescriptor() {
   std::string full_descriptor;
   if (nullptr != m_dataHandle) {
-    full_descriptor = k4FWCore::metaDataHandleDescriptor(m_dataHandle->objKey(), m_descriptor);
+    full_descriptor = podio::collMetadataParamName(m_dataHandle->objKey(), m_descriptor);
     // remove the "/Event/" part of the collections' object key if in read mode
     if (m_mode == Gaudi::DataHandle::Reader) {
       full_descriptor.erase(0, 7);