code: public boolean forceLoadTile(final OnlineTileSourceBase tileSource, final long pMapTileIndex) {
          try {
              final Drawable drawable = mTileDownloader.downloadTile(pMapTileIndex, mTileWriter, tileSource);
              return drawable != null;
          } catch (CantContinueException e) {
              return false;
          }
      }
docs: Actual tile download, regardless of the tile being already present in the cache
  
  @return true if success, false if error
  @since 5.6.5