Prompt user to save as project at end of workflow

[#1]

Similar post here for files but this solution didn't work for the project: https://community.jmp.com/t5/Discussions/Prompting-user-to-Save-As-at-the-end-of-workflow/td-p/91457... 

I'd like to prompt the user to save as a project since I have a workflow embedded in in a project for ease of use. Ideally the function is the same as if the user clicked File --> save project as. So a window pops up, they select a directory, and create a name for the project. 

The JSL below currently returns the following error

proj = Current Data Table() << Get Project();
proj << Save As("");

This version runs without error but doesn't actually do anything:

proj = Current Data Table() << Get Project();
proj << Save As();

[#2 · Accepted solution]

Is the current window  the project window?

Then 

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@Stefan_Moser wrote:

the same as if the user clicked File --> save project as.

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 can be implemented via

main menu("Save Project As")  

[#3]

Awesome yes @hogi it will always be the current window since the workflow is executed in that window.