code: public void addJavaScriptValues(Map<String, String> parameterMap) {
          for (Map.Entry<String, String> entry : parameterMap.entrySet()) {
              String parameterName = entry.getKey();
              String parameterValue = entry.getValue();
              this.javascriptExpressions.put(parameterName, parameterValue);
          }
      }
docs: Adds a set of javascript expressions to be passed from client to server.
  
  @param parameterMap a map containing the name of a parameter as key and a javascript
  expression as value
  @see #addJavaScriptValue(String, String)