resolve(token: CancellationToken): Promise<URI> {
		if (this._link.url) {
			try {
				if (typeof this._link.url === 'string') {
					return Promise.resolve(URI.parse(this._link.url));
				} else {
					return Promise.resolve(this._link.url);
				}
			} catch (e) {
				return Promise.reject(new Error('invalid'));
			}
		}

		if (typeof this._provider.resolveLink === 'function') {
			return Promise.resolve(this._provider.resolveLink(this._link, token)).then(value => {
				this._link = value || this._link;
				if (this._link.url) {
					// recurse
					return this.resolve(token);
				}

				return Promise.reject(new Error('missing'));
			});
		}

		return Promise.reject(new Error('missing'));
	}

			return asWinJsPromise(token => this._provider.resolveLink(this._link, token)).then(value => {