theGrid.hostElement.addEventListener("click",function(e){
    var ht = theGrid.hitTest(e)
    if (ht.panel.cellType ===wijmo.grid.CellType.TopLeft && ht.target.type ==="checkbox"){
        theGrid.rows.forEach(row=>{
          if(row.dataItem.id %2===0){
            row.isSelected = false
          } 
        })
    }
  })