static removeMemory(key) {
        checkParam(key, 'key', String);

        delete cache[key];
    }
/**
     * Removes a cache object from memory
     *
     * @param {String} key
     */
Removes a cache object from memory
@param {String} key
Removes a cache object from memory @param { String } key
static removeMemory(key) {
        checkParam(key, 'key', String);
        delete cache[key];
    }
static removeMemory ( key ) { checkParam ( key , 'key' , String ) ; delete cache [ key ] ; }
Removes a cache object from memory
 @param {String} key
Removes a cache object from memory @param { String } key