Function dataflow::render::threshold::threshold_arrangement

fn threshold_arrangement<G, T, R, L>(
    arrangement: &R, 
    name: &str, 
    logic: L
) -> Arranged<G, TraceAgent<OrdValSpine<Row, Row, G::Timestamp, Diff, usize>>> where
    G: Scope,
    G::Timestamp: Lattice + Refines<T>,
    T: Timestamp + Lattice,
    R: ReduceCore<G, Row, Row, Diff>,
    L: Fn(&Diff) -> bool + 'static, 

Shared function to compute an arrangement of values matching logic.