How to open closed project panel by PPro api?

Hello,

I want to open closed project panel by PPro API.

Steps:

1. Open project.
2. Close the panel. Right click on Project Panel >> 'Close Panel'.
3. Try to open Project by API.

I have tried to open that project once again by below code but it can't open the project panel.

var projToOpen = new File(projectFilePath);
app.openDocument( projToOpen.fsName,  1, // suppress 'Convert Project' dialogs?  1, // suppress 'Locate Files' dialogs?  1);

Is there any way to open it?

I found below API code to open extension but I am not sure that will work for this panel.

CSInterface.prototype.requestOpenExtension = function(extensionId, params)
{  window.__adobe_cep__.requestOpenExtension(extensionId, params);

};

Could you please suggest me the proper way to open that project panel once again if end user closes project panel and I need to reopen by API?

As well What should be the extensionId for that project panel?

PPro Version: 12.0.0