function onceimport { once } from "https://deno.land/x/effection@3.0.0-alpha.13/mod.ts"; once<T extends EventTarget, K extends EventList<T> | (string & { })>(target: T, name: K): Operation<EventTypeFromEventTarget<T, K>>Type ParametersT extends EventTargetK extends EventList<T> | (string & { })Parameterstarget: Tname: KReturnsOperation<EventTypeFromEventTarget<T, K>>