code: public String getParameterIgnoreCase(String name) {
          for (Map.Entry<String, String[]> entry : customParameters.entrySet()) {
              if (entry.getKey().equalsIgnoreCase(name)) {
                  return StringUtils.join(entry.getValue(), ",");
              }
          }
          return null;
      }
docs: Get a parameter by name, ignoring case.
  
  @param name the parameter to get
  @return a comma separated list of parameter values