import { ListNonEmptyBase } from "https://deno.land/x/rimbu@1.0.4/list/custom/implementation/leaf/non-empty.ts";
Parameters
flatMapFun: (value: T, index: number) => StreamSource<T2>
optional
range: IndexRangex/rimbu/list/custom/implementation/leaf/non-empty.ts>ListNonEmptyBase#flatMap
import { ListNonEmptyBase } from "https://deno.land/x/rimbu@1.0.4/list/custom/implementation/leaf/non-empty.ts";