Add restriction for values of execute_mode

Open

#947 opened on Dec 22, 2021 2 comments 0 reactions 1 assignee Assigned to @vagetablechicken View on GitHub

enhancement

Description

Now users can set any string value to `execute_mode` which is invalid and should be prevented when setting.

![image](https://user-images.githubusercontent.com/2715000/147051516-d86999ed-d876-4b26-bf46-d705754b00e9.png)

This issue has not been assessed yet.