simple-lru.js
function Entry(key, val, index) {
    this.key = key;
    this.val = val;
    this.index = index;
  }
function Entry(key, val, index) {
    this.key = key;
    this.val = val;
    this.index = index;
  }
function Entry ( key , val , index ) { this . key = key ; this . val = val ; this . index = index ; }
Cache entry instance

@param {String}
@param {any}
@param {Number}
@api private
Cache entry instance