code: public static IAtomContainerSet getAllMolecules(IReaction reaction) {
          IAtomContainerSet moleculeSet = reaction.getBuilder().newInstance(IAtomContainerSet.class);
  
          moleculeSet.add(getAllReactants(reaction));
          moleculeSet.add(getAllAgents(reaction));
          moleculeSet.add(getAllProducts(reaction));
  
          return moleculeSet;
      }
docs: Get all molecule of a {@link IReaction}: reactants + products.
  
  @param reaction  The IReaction
  @return The IAtomContainerSet