Constant GRID_OUTER

pub const GRID_OUTER: Grid;

A Grid where the outermost path is empty

use core_pb::grid::standard_grid::GRID_OUTER;
use core_pb::grid::Grid;
use core_pb::grid::computed_grid::ComputedGrid;

let grid: Grid = GRID_OUTER;
let computed_grid: ComputedGrid = grid.try_into().unwrap();