code: protected boolean setStereoInformation(AbstractMolecule firstContainer, IAtomBase firstRgroup,
        AbstractMolecule secondContainer, IAtomBase secondRgroup, IAtomBase atom1, IAtomBase atom2) throws CTKException {
      IStereoElementBase stereo = null;
      boolean result = false;
      if (firstContainer.isSingleStereo(firstRgroup)) {
        stereo = getStereoInformation(firstContainer, firstRgroup, atom2, atom1);
  
      }
      if (secondContainer.isSingleStereo(secondRgroup)) {
        stereo = getStereoInformation(secondContainer, secondRgroup, atom1, atom2);
  
      }
      if (stereo != null) {
  
        firstContainer.addIBase(stereo);
  
        result = true;
      }
      return result;
    }
docs: recycles and set stereo information on firstContaner
  
  @param firstContainer a first molecule instance of {@link AbstractMolecule}
  @param firstRgroup atom to remove, instance of {@link IAtomBase}
  @param secondContainer a second molecule, instance of {@link AbstractMolecule}
  @param secondRgroup atom to remove, instance of {@link IAtomBase}
  @param atom1 atom connected to firstGroup
  @param atom2 atom connected to secondGroup
  @return true, if stereo information was set, false otherwise
  @throws CTKException general ChemToolKit exception passed to HELMToolKit