src/vs/platform/files/common/fileService.ts/FileService/getExtUri
class FileService:	private getExtUri(provider: IFileSystemProvider): { providerExtUri: IExtUri; isPathCaseSensitive: boolean } {
		const isPathCaseSensitive = this.isPathCaseSensitive(provider);

		return {
			providerExtUri: isPathCaseSensitive ? extUri : extUriIgnorePathCase,
			isPathCaseSensitive
		};
	}