blankCell

You can achieve a basic cell merging effect by using the equalBlank property. For information on merging actual column cells instead of emptying a column, see Column Cell Merging.

If you set the equalBlank property of a column to true, cells matching the value of the immediately preceding row will be blanked out without being drawn

var columns = [{
...
},{
     name: "Gender",
     fieldName: "Gender",
     width: "40",
     header: {
       text: "Gender",
       styleName: "orange-column",
     },
     equalBlank: true
   },{
...
}];
grid.setColumns(columns);

gridView.setColumnProperty("Gender", "equalBlank", true);

gridView.setColumnProperty("Gender", "equalBlank", false);

Multi selection cell button