How do you use the rallyaddnew xtype with Portfolio Items? The example shown in the documentation is for User stories. For that it shows that recordTypes: ['User Story']
There are no examples or documentation on what to do for other items. recordType: ['Portfolio Item'] does not seem to work, and its unclear anyway what level of Portfolio item that would create.
In my case, I'd like to create a feature level portfolio item with some fields like "expected start date" set by default by my app. How does one do this?