method EventListenerMap.prototype.hasimport { EventListenerMap } from "https://deno.land/x/dom_diff@1.0.0-beta.2/utils/get_event_listeners/map.ts"; has(listener: Pick<Listener, EqualityDeps>): booleanWhether the listener exist or not. Parameterslistener: Pick<Listener, EqualityDeps>Returnsboolean