public static void setAtomProperties(IChemModel chemModel, System.Object propKey, System.Object propVal)
 {
     if (chemModel.SetOfMolecules != null)
     {
         SetOfMoleculesManipulator.setAtomProperties(chemModel.SetOfMolecules, propKey, propVal);
     }
     if (chemModel.SetOfReactions != null)
     {
         SetOfReactionsManipulator.setAtomProperties(chemModel.SetOfReactions, propKey, propVal);
     }
     if (chemModel.Crystal != null)
     {
         AtomContainerManipulator.setAtomProperties(chemModel.Crystal, propKey, propVal);
     }
 }