public boolean isCached(String requestUrl,int maxWidth,int maxHeight){
  return isCached(requestUrl,maxWidth,maxHeight,ScaleType.CENTER_INSIDE);
}

public boolean isCached ( String requestUrl , int maxWidth , int maxHeight ) { return isCached ( requestUrl , maxWidth , maxHeight , ScaleType . CENTER_INSIDE ) ; }
checks if the item is available in the cache .
