Creating a jfxtras Grid in JFX

GridNode.fx

/* Creating an org.jfxtras.scene.layout.Grid */

public class MyGrid extends CustomNode {
   override function create(): Node {
      Grid {
         rows: [
            Row{
               cells: [Text {content: "Username:"}, TextBox {}]
            },
            Row{
               cells: [Text {content: "Password:"}, TextBox {}]
            }
         ]
      }
   }
}