method Channel.prototype.groupByRe-exportimport { Channel } from "https://deno.land/x/async_channels@v1.0.0-alpha54/mod.ts"; groupBy<TKey extends (string | symbol)>(fn: (val: T) => TKey | Promise<TKey>, pipeOpts?: ChannelPipeOptions): Record<TKey, Receiver<T>>Type ParametersTKey extends (string | symbol)Parametersfn: (val: T) => TKey | Promise<TKey>optionalpipeOpts: ChannelPipeOptionsReturnsRecord<TKey, Receiver<T>>