Render dGrid Header Cell to have a dijit

gistfile1.js

renderHeaderCell: lang.hitch(this,function(node) {
                        var checkbox = new CheckBox({
                            value : false,
                            label : "Include All ?",
                            onClick: lang.hitch(this, function(state) {
                                this._selectAll(state);
                            }),
                            declaredClass: "invoice-grid-include-all",
                            class : "invoice-grid-include-all"
                        });
                        checkbox.placeAt(node);
                        this.selectAllCheckBox = checkbox;
                        domConstruct.create('label', {for: checkbox.id, innerHTML:"Included ?"}, node);
                    }),