context: YAHOO.widget.DataSource.prototype._addCacheElem = function(resultObj) {    var aCache = this._aCache;    // Don't add if anything important is missing.    if(!aCache || !resultObj || !resultObj.query || !resultObj.results) {        return;    }        // If the cache is full, make room by removing from index=0    if(aCache.length >= this.maxCacheEntries) {        aCache.shift();    }            // Add to cache, at the end of the array    aCache.push(resultObj);};
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