docs: def snap_bbox(ctx, bounds, zoom):
      """Snap bbox to tile grid."""
      click.echo(box(*tilematrix.snap_bounds(
          bounds=bounds,
          tile_pyramid=TilePyramid(
              ctx.obj['grid'],
              tile_size=ctx.obj['tile_size'],
              metatiling=ctx.obj['metatiling']
          ),
          zoom=zoom,
          pixelbuffer=ctx.obj['pixelbuffer']
      )))