async function closeWindowsInternal() {
    // If there are no editors, we can skip. This seems to time out if no editors visible.
    if (
        !vscode.window.visibleTextEditors ||
        (vscode.env.appName.toLowerCase().includes('insiders') && !vscode.window.visibleNotebookEditors)
    ) {
        // Instead just post the command
        void vscode.commands.executeCommand('workbench.action.closeAllEditors');
        return;
    }

    class CloseEditorsTimeoutError extends Error {
        constructor() {
            super("Command 'workbench.action.closeAllEditors' timed out");
        }
    }
    const closeWindowsImplementation = (timeout = 2_000) => {
        return new Promise<void>((resolve, reject) => {
            // Attempt to fix #1301.
            // Lets not waste too much time.
            const timer = setTimeout(() => reject(new CloseEditorsTimeoutError()), timeout);
            vscode.commands.executeCommand('workbench.action.closeAllEditors').then(
                () => {
                    clearTimeout(timer);
                    resolve();
                },
                (ex) => {
                    clearTimeout(timer);
                    reject(ex);
                }
            );
        });
    };

    // For some reason some times the command times out.
    // If this happens, just wait & retry, no idea why VS Code is flaky.
    // Lets wait & retry executing the command again, hopefully it'll work second time.
    try {
        await closeWindowsImplementation();
    } catch (ex) {
        if (ex instanceof CloseEditorsTimeoutError) {
            // Do nothing. Just stop waiting.
        } else {
            throw ex;
        }
    }
}