import { type ExtensionEventCallback } from "https://deno.land/x/harmony@v2.9.1/src/commands/extension.ts";
definition: (ext: Extension, ...args: any[]) => any
x/harmony/src/commands/extension.ts>ExtensionEventCallback
import { type ExtensionEventCallback } from "https://deno.land/x/harmony@v2.9.1/src/commands/extension.ts";