code: protected void addAdditionalParams(HashMap<String, String> params,
  			ArrayList<Param> extractedParams) {
  		for (String key : params.keySet()) {
  			if (!ParamEnum.from(key)) {
  				extractedParams.add(new Param(key, params.get(key)));
  			}
  		}
  	}
docs: Adds params found in the URL that are not in the {@link DescribeService}
  document of the service. Having this, we can add in the URL to POIProxy
  params from the original service. This should not be a good option when
  we want to have a single interface, but allows anyone to access the
  original API adding the original parameters to the POIProxy request
  
  @param params
  @param extractedParams