code: public static AtomSite convertAtomToAtomSite(Atom a, int model, String chainName, String chainId) {
  		return convertAtomToAtomSite(a, model, chainName, chainId, a.getPDBserial());
  	}
docs: Converts an Atom object to an {@link AtomSite} object.
  @param a
  @param model the model number for the output AtomSites
  @param chainName the chain identifier (author id) for the output AtomSites
  @param chainId the internal chain identifier (asym id) for the output AtomSites
  @return