code: public String params(String param) {
          if (param == null) {
              return null;
          }
  
          if (param.startsWith(":")) {
              return params.get(param.toLowerCase()); // NOSONAR
          } else {
              return params.get(":" + param.toLowerCase()); // NOSONAR
          }
      }
docs: Returns the value of the provided route pattern parameter.
  Example: parameter 'name' from the following pattern: (get '/hello/:name')
  
  @param param the param
  @return null if the given param is null or not found