code: private void cacheConfig(String oid, JsonSimpleConfig config) {
  		if (useCache && config != null) {
  			configCache.put(oid, config);
  		}
  	}
docs: Add a config class to the cache if caching if configured
  
  @param oid
  : The config OID to use as an index
  @param config
  : The instantiated JsonConfigHelper to cache