AirLoopHVAC:UnitarySystem does not create handle for Extensible Groups

[Ski90Moo]

Issue overview

1. When adding extensible groups to the Coil:Cooling:DX:MultiSpeed (stages), it does not create/import the necessary default objects Coil:Cooling:DX:MultiSpeed:StageData.

2. Additionally, I have created a library file with the necessary stage data and connected the handles to the extensible stages fields. However, when the AirLoopHVAC:UnitarySystem is imported from the library into the current project, the extensible stages fields get overwritten to a blank.

Current Behavior

Expected Behavior

Steps to Reproduce

Possible Solution

Details

Environment

Some additional details about your environment for this issue (if relevant):

• Platform (Operating system, version): Windows 10
• Version of OpenStudioApplication (if using an intermediate build, include SHA):

Context

This issue makes it so the user must manually connect the stage data to the multispeed dx coil within the osm file.