Add access function to cell type

src/mesh/Connectivity.hpp

@@ -310,6 +310,11 @@ class Connectivity final
   }
 
  public:
+  PASTIS_INLINE
+  const CellValue<const CellType>& cellType() const
+  {
+    return m_cell_type;
+  };
 
   PASTIS_INLINE
   const bool& isConnectivityMatrixBuilt(const ItemType& item_type_0,