setBordersByCellNodeIdToHighlightedCells

Sets a property bordersByCellNodeId on the step data, containing an object with the highlighted cell node id as key and its corresponding borderDirections as value.

The cells can either be highlighted by the column/row widget or by making a selection with the CellsHighlightButton. When the CellsHighlightButton is in view (the toolbar containing CellsHighlightButton is selected), then the visualization of the highlighting changes, and also single selected cells are highlighted.

You could also use set-border-mode-for-highlighted-cells if you want the user to choose which borders to target from the highlighted cells.