code: @Override
  	public SortedSet<String> getDomainNames(String name) {
  		if ( name.length() < 4)
  			throw new IllegalArgumentException("Can't interpret IDs that are shorter than 4 residues!");
  
  		String url = String.format("%srepresentativeDomains?cluster=%s&structureId=%s",
  				base, cutoff, name);
  		return requestRepresentativeDomains(url);
  	}
docs: Gets a list of domain representatives for a given PDB ID.