code: public void updateAtomArrays() throws IOException, StructureException {
  		AtomCache cache = new AtomCache();
  		atomArrays = new ArrayList<Atom[]>();
  		for (StructureIdentifier name : getStructureIdentifiers()) {
  			Atom[] array = cache.getRepresentativeAtoms(name);
  			atomArrays.add(array);
  		}
  	}
docs: Force the atom arrays to regenerate based on
  {@link #getStructureIdentifiers()}.
  
  @throws IOException
  @throws StructureException