Shared options accepted by single-segment divider helpers.
WHY: dividerFirst and dividerLast always flatten before selecting a segment, so exposing flatten would suggest a behavior callers cannot meaningfully control.
dividerFirst
dividerLast
flatten
Shared options accepted by single-segment divider helpers.
WHY:
dividerFirstanddividerLastalways flatten before selecting a segment, so exposingflattenwould suggest a behavior callers cannot meaningfully control.