adding accessing function for FilterCake for Connection

opm/input/eclipse/Schedule/Well/Connection.hpp

@@ -168,6 +168,7 @@ namespace RestartIO {
         bool activeInjMult() const;
         void setInjMult(const InjMult& inj_mult);
         void setFilterCake(const FilterCake& filter_cake);
+        const FilterCake& getFilterCake() const;
 
         void setState(State state);
         void setComplnum(int compnum);

src/opm/input/eclipse/Schedule/Well/Connection.cpp

@@ -479,4 +479,9 @@ void Connection::setFilterCake(const Connection::FilterCake& filter_cake) {
         this->m_filter_cake = filter_cake;
 }
 
+
+const Connection::FilterCake& Connection::getFilterCake() const {
+        return this->m_filter_cake;
+}
+
 }