package webextension_polyfill.webrequest;
/**
Fired when a request is completed.
**/
typedef OnCompletedEvent = {
/**
Registers an event listener callback to an event.
**/
function addListener(callback:(details:OnCompletedDetailsType) -> Void, filter:RequestFilter, ?extraInfoSpec:Array):Void;
/**
Deregisters an event listener callback from an event.
**/
function removeListener(callback:(details:OnCompletedDetailsType) -> Void):Void;
function hasListener(callback:(details:OnCompletedDetailsType) -> Void):Bool;
function hasListeners():Bool;
};