Function unit_cube_edges_distributed 

pub fn unit_cube_edges_distributed<T: Scalar + Equivalence, C: Communicator>(
    comm: &C,
    partitioner: GraphPartitioner,
    nx: usize,
    ny: usize,
    nz: usize,
) -> ParallelGridImpl<'_, C, SingleElementGrid<T, CiarletElement<T, IdentityMap, T>>>

Create a grid of the edges of a unit cube distributed in parallel