Setting inScrollableWidget to false throws error.

[hmarat]

Describe the bug I want to put WeekView widget inside a Column, and make scrollable the whole column. So I set inScrollableWidget: false But get this error: Null check operator used on a null value

Here in the image I will show the point where error throws. (Source code of your week_view.dart)

Steps to reproduce the behavior:

1. Set WeekView's inScrollableWidget property to false
2. See error