docs: protected Map<String, List<String>> getParams(FacesContext context, NavigationCase navCase, UIOutcomeTarget outcomeTarget) {
          //UI Params
          Map<String, List<String>> params = outcomeTarget.getParams();
  
          //NavCase Params
          Map<String, List<String>> navCaseParams = navCase.getParameters();
          if (navCaseParams != null && !navCaseParams.isEmpty()) {
              if (params == null) {
                  params = new LinkedHashMap<>();
              }
  
              for (Map.Entry<String, List<String>> entry : navCaseParams.entrySet()) {
                  String key = entry.getKey();
  
                  //UIParams take precedence
                  if (!params.containsKey(key)) {
                      List<String> values = entry.getValue();
                      if (containsEL(values)) {
                          params.put(key, evaluateValueExpressions(context, values));
                      }
                      else {
                          params.put(key, values);
                      }
                  }
              }
          }
  
          if (PrimeApplicationContext.getCurrentInstance(context).getEnvironment().isAtLeastJsf22()) {
              String toFlowDocumentId = navCase.getToFlowDocumentId();
              if (toFlowDocumentId != null) {
                  if (params == null) {
                      params = new LinkedHashMap<>();
                  }
  
                  List<String> flowDocumentIdValues = new ArrayList<>();
                  flowDocumentIdValues.add(toFlowDocumentId);
                  params.put(FlowHandler.TO_FLOW_DOCUMENT_ID_REQUEST_PARAM_NAME, flowDocumentIdValues);
  
                  if (!FlowHandler.NULL_FLOW.equals(toFlowDocumentId)) {
                      List<String> flowIdValues = new ArrayList<>();
                      flowIdValues.add(navCase.getFromOutcome());
                      params.put(FlowHandler.FLOW_ID_REQUEST_PARAM_NAME, flowIdValues);
                  }
              }
          }
  
          return params;
      }