Merge manager class used by the FlexGridDetailProvider class.
The DetailMergeManager merges detail cells (cells in a DetailRow) into a single detail cell that spans all grid columns.
constructor(grid: FlexGrid): DetailMergeManager
Initializes a new instance of the DetailMergeManager class.
The FlexGrid object that owns this DetailMergeManager.
Whether to clip the merged range to the grid's current view range.