Sorry, that wasn't very clear. `&mut self` in the first method ("use") is an example of a non-affine type, `self` in the "consume" method is an affine type whic

Sorry, that wasn't very clear. `&mut self` in the first method ("use") is an example of a non-affine type, `self` in the "consume" method is an affine type which cannot be re-used.