give edges a color to mark them from user side

src/storm/storage/jani/Edge.cpp

@@ -92,6 +92,14 @@ namespace storm {
             return actionIndex == Model::SILENT_ACTION_INDEX;
         }
 
+        uint64_t Edge::getColor() const {
+            return this->color;
+        }
+
+        void Edge::setColor(uint64_t newColor) {
+            this->color = newColor;
+        }
+        
         boost::container::flat_set<storm::expressions::Variable> const& Edge::getWrittenGlobalVariables() const {
             return templateEdge->getWrittenGlobalVariables();
         }

src/storm/storage/jani/Edge.h

@@ -111,6 +111,16 @@ namespace storm {
              */
             bool usesAssignmentLevels(bool onlyTransient = false) const;
 
+            /*!
+             * Retrieves the color of the edge
+             */
+            uint64_t getColor() const;
+
+            /*!
+             * Sets the color of the edge
+             */
+            void setColor(uint64_t newColor);
+
             /*!
              *
              * @param localVars
@@ -151,6 +161,9 @@ namespace storm {
             
             /// The concrete destination objects.
             std::vector<EdgeDestination> destinations;
+
+            /// The color of the edge, used to persistently mark and identify specific edges (by the user)
+            uint64_t color;
         };
         
         std::ostream& operator<<(std::ostream& stream, Edge const& edge);