question: public String buildLocalFilePath ( int x , int y , int z , String fileExt ) { if ( localTilePathBuilder == null ) { localTilePathBuilder = new TilePathBuilder ( localCacheDir ) ; } return localTilePathBuilder . buildTilePath ( x , y , z , fileExt ) ; }
target:  Acts the same as the buildFilePath method, but works for a local directory specified in the properties.