In a data grid 2 there is a configuration option to allow single or multiselect. In case of single selection, the check boxes in the very first column should radio buttons, because that's the general component to be used for a selection "one out of a row".
(We know the workaround to add a custom boolean field and an additional column in the grid, but that would be way too much effort for a dozens of grids in an application.
Also, there would be the styling option to "fake" the check box being a radio button. But in this case, the behaviour would be different: A radio button can't be "deselected", whilst a check box could.)