How to Range Selection in FSCalendar in Swift?

I am trying to use FSCalendar in one of my project to selecting range of dates.

What I found is this library have Swift version however range selection version is only available with Objective-C. So what I tried to make is using bridging, however I am unable to use the RangePickerViewController in Swift.

Did anyone implemented this library for Swift for using date range? (e.x. I want to select 2 dates as range for flight app where I am select Departure & Return flight dates.)

How to Range Selection in FSCalendar in Swift?