Button groups are used to switch between complementary views for example, but they must never be used for complementary actions, "Change and Cancel" actions, or "Save and Cancel" actions. In those cases, single buttons are the correct solution.
Stable3.111.0View in LexiconCHANGELOG
You can use the variant ClayButton.Group for creating button groups:
Use spaced property to create spacing between buttons.