code: @Override
  	public List<String> getPrefixes(String namespaceURI) {
  		List<String> list=new ArrayList<String>();
  		for(Entry<String,String> entry:this.map.entrySet()) {
  			if(entry.getValue().equals(namespaceURI)) {
  				list.add(entry.getKey());
  			}
  		}
  		return list;
  	}
docs: {@inheritDoc}