public void decrement(int numBytes) {
      if (this.mNumBytes >= numBytes && this.mCount > 0) {
        this.mCount--;
        this.mNumBytes -= numBytes;
      } else {
        FLog.wtf(
            TAG,
            "Unexpected decrement of %d. Current numBytes = %d, count = %d",
            numBytes,
            this.mNumBytes,
            this.mCount);
      }
    }
'Decrement' an item from the counter

@param numBytes size of the item in bytes
imagepipeline/src/main/java/com/facebook/imagepipeline/memory/BasePool.java