import { CustomEvent } from "https://deno.land/x/deno_slack_sdk@2.12.0/events/mod.ts";
Parameters
manifest: SlackManifest
x/deno_slack_sdk/events/mod.ts>CustomEvent#registerParameterTypes
import { CustomEvent } from "https://deno.land/x/deno_slack_sdk@2.12.0/events/mod.ts";