Add config plugin class.

fairmq/PropertyOutput.h

@@ -0,0 +1,20 @@
+/********************************************************************************
+ * Copyright (C) 2014-2018 GSI Helmholtzzentrum fuer Schwerionenforschung GmbH  *
+ *                                                                              *
+ *              This software is distributed under the terms of the             *
+ *              GNU Lesser General Public Licence (LGPL) version 3,             *
+ *                  copied verbatim in the file "LICENSE"                       *
+ ********************************************************************************/
+#ifndef FAIR_MQ_PROPERTYOUT_H
+#define FAIR_MQ_PROPERTYOUT_H
+
+#include <fairmq/Properties.h>
+
+#include <sstream>
+
+inline std::ostream& operator<<(std::ostream& os, const fair::mq::Property& p)
+{
+    return os << fair::mq::PropertyHelper::GetPropertyInfo(p).first;
+}
+
+#endif /* FAIR_MQ_PROPERTYOUT_H */