nclick = function () {
                                col.expanded = !col.expanded
                                that.renderTable(id)
                            }
                            link.appendChild(this.createExpander(col.expanded))
                            link.innerHTML += col.name
                            th.appendChild(link)
                        }
                    }
                    let classes = (cell.leftBd ? " leftBorder" : "") + (cell.rightBd ? " rightBorder" : "")
     