corrections to groupData(..) in eclwellmanager.hh

ebos/eclwellmanager.hh

@@ -42,6 +42,7 @@
 #include <opm/output/eclipse/RestartValue.hpp>
 
 #include <opm/output/data/Wells.hpp>
+#include <opm/output/data/Groups.hpp>
 #include <opm/material/common/Exceptions.hpp>
 
 #include <opm/models/utils/propertysystem.hh>
@@ -567,6 +568,10 @@ public:
         return wellDat;
     }
 
+    Opm::data::Group groupData(const int reportStepIdx, Opm::Schedule& sched) const {
+        return {};
+    }
+
     /*!
      * \brief This method writes the complete state of all wells
      *        to the hard disk.