src/vs/workbench/services/dialogs/browser/abstractFileDialogService.ts/AbstractFileDialogService/pickWorkspaceAndOpenSimplified
class AbstractFileDialogService:	protected async pickWorkspaceAndOpenSimplified(schema: string, options: IPickAndOpenOptions): Promise<void> {
		const title = nls.localize('openWorkspace.title', 'Open Workspace from File');
		const filters: FileFilter[] = [{ name: nls.localize('filterName.workspace', 'Workspace'), extensions: [WORKSPACE_EXTENSION] }];
		const availableFileSystems = this.addFileSchemaIfNeeded(schema, true);

		const uri = await this.pickResource({ canSelectFiles: true, canSelectFolders: false, canSelectMany: false, defaultUri: options.defaultUri, title, filters, availableFileSystems });
		if (uri) {
			return this.hostService.openWindow([{ workspaceUri: uri }], { forceNewWindow: options.forceNewWindow, remoteAuthority: options.remoteAuthority });
		}
	}