public synchronized void increment(long sizeIncrement, long countIncrement) {
      if (mInitialized) {
        mSize += sizeIncrement;
        mCount += countIncrement;
      }
    }
Stats about the cache - currently size of the cache (in bytes) and number of items in the cache
imagepipeline-base/src/main/java/com/facebook/cache/disk/DiskStorageCache.java