code: public static <T> T withJsonFile(File jsonFile, Class<T> c) {
          try {
              return jsonMapper.readValue(jsonFile, c);
          } catch (Exception e) {
              return JMExceptionManager.handleExceptionAndReturnNull(log, e,
                      "withJsonFile", jsonFile);
          }
      }
docs: With json file t.
  
  @param <T>      the type parameter
  @param jsonFile the json file
  @param c        the c
  @return the t