/**
* A JavaScript function cache. This is implemented by the lru-cache module
* on NPM, so you can simply do `ejs.cache = LRU(10)` to get a
* least-recently-used cache.
*
* @interface Cache
* @global
*/
/**
* Cache the intermediate JavaScript function for a template.
*
* @function
* @name Cache#set
* @param {String} key key for caching
* @param {Function} val cached function
*/
/**
* Get the cached intermediate JavaScript function for a template.
*
* If the cache does not contain the specified key, `null` shall be returned.
*
* @function
* @name Cache#get
* @param {String} key key for caching
* @return {null|Function}
*/
/**
* Reset the entire cache.
*
* Erases the entire cache. Called by {@link module:ejs.clearCache}
*
* @function
* @name Cache#reset
*/