Unmerge cell range

Description

Unmerge selected cell range.

(function()
{
    Api.GetActiveSheet().GetRange("C5:D10").UnMerge();
})();

Methods used: GetActiveSheet, GetRange, UnMerge

Reference Microsoft VBA macro code
Sub example()
    Range("C5:D10").UnMerge
End Sub
Result

Unmerge-before Unmerge-after