How to properly specify the return type of the Blender operator execute function

When using typing in code that calls the Blender Python API, we usually don't encounter any problems. However, specifying the return type for the execute() function of the Blender operator is not entirely obvious.

Read more: https://b3d.interplanety.org/en/how-to-properly-specify-the-return-type-of-the-blender-operator-execute-function/

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