src/vs/workbench/api/common/extHostQuickOpen.ts/ExtHostQuickOpenImpl/showWorkspaceFolderPick
class ExtHostQuickOpenImpl:		async showWorkspaceFolderPick(options?: WorkspaceFolderPickOptions, token = CancellationToken.None): Promise<WorkspaceFolder | undefined> {
			const selectedFolder = await this._commands.executeCommand<WorkspaceFolder>('_workbench.pickWorkspaceFolder', [options]);
			if (!selectedFolder) {
				return undefined;
			}
			const workspaceFolders = await this._workspace.getWorkspaceFolders2();
			if (!workspaceFolders) {
				return undefined;
			}
			return workspaceFolders.find(folder => folder.uri.toString() === selectedFolder.uri.toString());
		}