code: public static Object get(String filePath, String configKey)
      {
          if (propertiesMap.containsKey(filePath) == false)
          {
              loadProperty(filePath);
          }
  
          Properties properties = propertiesMap.get(filePath);
          if (properties == null)
          {
              return null;
          }
  
          Object resultConfig = properties.getProperty(configKey);
          return resultConfig;
      }
docs: Get from config defined property files in classpath.
  
  @param filePath property file path in classpath
  @param configKey configkey
  @return config value defined in property file