disable checkbox selection in Ag-grid

is it possible to disable checkbox selection by preserving some selected rows rendered with some constraints? I dont want to allow users to deselect rows which were selected while rendering.

I found this.gridOptions.suppressCellSelection = true; but this just hides the checkbox whereas i need to show the checkbox in disable mode.

Thanks.

I resolved it by adding rowClassRules in GridOptions

            rowClassRules: {
                'ag-row-selected' : function(params) {
                    return params.node.selected === true;
                },
            },

This will add css as below to disable checkbox click

.ag-row-selected{
        .ag-cell .ag-cell-wrapper .ag-selection-checkbox .ag-icon-checkbox-checked {
            pointer-events: none;
        }
    }

RowClass rules are applied when grid is updated/refreshed or nodes are updated. I did it by updating specific nodes

           node.setSelected(true);
           // this is to trigger rowClass for selected/non-selected rows
           // to disable checkbox selection
           node.setData(node.data);