@SuppressLint("InvalidAccessToGuardedField")
  private void logStats() {
    if (FLog.isLoggable(FLog.VERBOSE)) {
      FLog.v(
          TAG,
          "Used = (%d, %d); Free = (%d, %d)",
          mUsed.mCount,
          mUsed.mNumBytes,
          mFree.mCount,
          mFree.mNumBytes);
    }
  }
Simple 'debug' logging of stats. WARNING: The caller is responsible for synchronization
imagepipeline/src/main/java/com/facebook/imagepipeline/memory/BasePool.java