code: @Override
      public void removeElectronContainer(IElectronContainer electronContainer) {
          if (electronContainer instanceof IBond)
              removeBond((IBond) electronContainer);
          else if (electronContainer instanceof ILonePair)
              removeLonePair((ILonePair) electronContainer);
          else if (electronContainer instanceof ISingleElectron)
              removeSingleElectron((ISingleElectron) electronContainer);
      }
docs: {@inheritDoc}