Function dataflow::render::threshold::build_threshold_basic

pub fn build_threshold_basic<G, T>(
    input: CollectionBundle<G, Row, T>, 
    key: Vec<MirScalarExpr>
) -> CollectionBundle<G, Row, T> where
    G: Scope,
    G::Timestamp: Lattice + Refines<T>,
    T: Timestamp + Lattice, 

Build a dataflow to threshold the input data.

This implementation maintains rows in the output, i.e. all rows that have a count greater than zero. It returns a CollectionBundle populated from a local arrangement.