code: public static void unregisterElectronContainerListeners(IAtomContainer container) {
          for (IElectronContainer electronContainer : container.electronContainers())
              electronContainer.removeListener(container);
      }
docs: A method to remove ElectronContainerListeners.
  ElectronContainerListeners are used to detect changes
  in ElectronContainers (like bonds) and to notifiy
  registered Listeners in the event of a change.
  If an object looses interest in such changes, it should
  unregister with this AtomContainer in order to improve
  performance of this class.