CellBorderSide>= v1.23.0

CellBorderSide:

type CellBorderSide =
  | "ol"
  | "or"
  | "ot"
  | "ob"
  | "iv"
  | "ih";

A border of the selected table cells. 'ol', 'or', 'ot' and 'ob' are the outer left, right, top and bottom borders of the selection. 'iv' and 'ih' are the inner vertical and horizontal borders between its cells.