src/vs/workbench/services/extensions/common/extensionDescriptionRegistry.ts/ExtensionDescriptionRegistry/getExtensionDescriptionsForActivationEvent
class ExtensionDescriptionRegistry:	public getExtensionDescriptionsForActivationEvent(activationEvent: string): IExtensionDescription[] {
		const extensions = this._activationMap.get(activationEvent);
		return extensions ? extensions.slice(0) : [];
	}