Function screen_distributed 

pub fn screen_distributed<T: Scalar + Equivalence, C: Communicator>(
    comm: &C,
    partitioner: GraphPartitioner,
    ncells: usize,
    cell_type: ReferenceCellType,
) -> ParallelGridImpl<'_, C, SingleElementGrid<T, CiarletElement<T, IdentityMap, T>>>

Create a grid of a square screen distributed in parallel