Making a cancellable operator in Blender uncancellable

When defining custom operators in Blender, we can make them cancellable and uncancellable by specifying the "UNDO" value in the "bl_options" parameter of the operator. But what if we need to exclude an existing operator, for example, a system operator, from the undo queue? This is very easy to do by redefining the operator with our own, without specifying "UNDO" in its parameters.

Read more: https://b3d.interplanety.org/en/making-a-cancellable-operator-in-blender-uncancellable/