src/vs/workbench/api/common/extHostWorkspace.ts/compareWorkspaceFolderByUri
function compareWorkspaceFolderByUri(a: vscode.WorkspaceFolder, b: vscode.WorkspaceFolder, extHostFileSystemInfo: IExtHostFileSystemInfo): number {
	return isFolderEqual(a.uri, b.uri, extHostFileSystemInfo) ? 0 : compare(a.uri.toString(), b.uri.toString());
}