code: public String[] getParameterValues(final String name)
     {
        List<String> values = parameters.get(name);
        if (values == null)
        {
           return null;
        }
  
        return values.toArray(new String[values.size()]);
     }
docs: Get the array of values for a given parameter name.
  
  @return The values of the parameter, null if the parameter does not exist.