src/vs/code/electron-browser/sharedProcess/contrib/extensionsCleaner.ts/ProfileExtensionsCleaner/addExtensionWithKey
class ProfileExtensionsCleaner:	private addExtensionWithKey(key: string, extensionsProfileLocation: URI): void {
		let locations = this.profileExtensionsLocations.get(key);
		if (!locations) {
			locations = [];
			this.profileExtensionsLocations.set(key, locations);
		}
		locations.push(extensionsProfileLocation);
	}