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Changes between Initial Version and Version 1 of Ticket #33830, comment 3

initial	v1
1	1	Although the problem is similar, the fix must be different here. We can not easily supply some default context from the outside here since the missing variable is in the `attrs` attribute of the checkbox widget.
2	2
3		It is guaranteed by the base `Widget` that `attrs` will always be a `dict ` instance. But it is not guaranteed that the key `disabled` will always be present on the `attrs`, so we will mostly find it to be either missing or set to `True` (could as well be set to `False`, if the default is explicitly stated).
	3	It is guaranteed by the base `Widget` that `attrs` will always be a `dict` instance. But it is not guaranteed that the key `disabled` will always be present on the `attrs`, so we will mostly find it to be either missing or set to `True` (could as well be set to `False`, if the default is explicitly stated).
4	4
5	5	I guess a proper fix would be something along the lines of