Type Alias FlatMapOk 

type FlatMapOk<T> = ConsolidatingColumnBuilder<Row, T, Diff>;

Output ok-session container builder for flat_map_stage.

Consolidating like the err builder, but emits Column<(Row, T, Diff)>. The mfp builds each output row fresh, so the owned give into staging is a move.

Aliased Type

struct FlatMapOk<T> { /* private fields */ }