code: @Override
  	public boolean hasNonPolyChain(String asymId){
  		int modelnr = 0;
  
  		List<Chain> chains = models.get(modelnr).getNonPolyChains();
  		for (Chain c : chains) {
  			// we check here with equals because we might want to distinguish between upper and lower case chains!
  			if (c.getId().equals(asymId)) {
  				return true;
  			}
  		}
  		return false;
  	}
docs: {@inheritDoc}