extensions/html-language-features/server/src/customData.ts/fetchHTMLDataProviders
export function fetchHTMLDataProviders(dataPaths: string[], requestService: RequestService): Promise<IHTMLDataProvider[]> {
	const providers = dataPaths.map(async p => {
		try {
			const content = await requestService.getContent(p);
			return parseHTMLData(p, content);
		} catch (e) {
			return newHTMLDataProvider(p, { version: 1 });
		}
	});

	return Promise.all(providers);
}