getParent()
returns the parent of a cell
getParent(): object;
Returns:
The config object of the parent of a cell.
Example
const tabbar = new dhx.Tabbar("tabbar_container", {
    mode: "top",
    css: "dhx_widget--bordered",
    views: [
        { id: "vilnius", tab: "Vilnius" },
        { tab: "dataview", id: "dataview"}
    ]
});
tabbar.getCell("vilnius").getParent();