function reduceimport { reduce } from "https://deno.land/x/async_channels@v1.0.0-alpha54/pipe.ts"; reduce<T>(fn: (prev: T, current: T) => T | Promise<T>, pipeOpts?: ChannelPipeOptions)Type ParametersTParametersfn: (prev: T, current: T) => T | Promise<T>optionalpipeOpts: ChannelPipeOptions