fun inset(@Px insetBefore: Int, @Px insetAfter: Int): RecyclerViewDivider.BuilderSet the inset before and after the divider. It will be equal for all dividers. To set a custom inset for each divider, use insetManager instead.
insetBefore - the inset that will be applied before.
insetAfter - the inset that will be applied after.
Return
this Builder instance.