import { ListContext } from "https://deno.land/x/rimbu@1.0.4/list/custom/context.ts";
Parameters
left: LeafBlockBuilder<T>
right: LeafBlockBuilder<T>
optional
middle: NonLeafBuilder<T, LeafBlockBuilder<T>>x/rimbu/list/custom/context.ts>ListContext#leafTreeBuilder
import { ListContext } from "https://deno.land/x/rimbu@1.0.4/list/custom/context.ts";