code: @Override
      public void addAtomContainer(IAtomContainer atomContainer, double multiplier) {
          if (atomContainerCount + 1 >= atomContainers.length) {
              growAtomContainerArray();
          }
          atomContainer.addListener(this);
          atomContainers[atomContainerCount] = atomContainer;
          multipliers[atomContainerCount] = multiplier;
          atomContainerCount++;
          notifyChanged();
      }
docs: Adds an atomContainer to this container with the given
  multiplier.
  
  @param  atomContainer  The atomContainer to be added to this container
  @param  multiplier     The multiplier of this atomContainer