code: public RendererJob otherTile(Tile tile) {
          return new RendererJob(tile, this.rendererJob.mapDataStore, this.rendererJob.renderThemeFuture, this.rendererJob.displayModel,
                  this.rendererJob.textScale, this.rendererJob.hasAlpha, this.rendererJob.labelsOnly);
      }
docs: Just a way of generating a hash key for a tile if only the RendererJob is known.
  
  @param tile the tile that changes
  @return a RendererJob based on the current one, only tile changes