colspan not working whith gridpan

[mooninvader]

gridPane=build(GridPane, hgap: GAP, vgap: GAP, alignment: Pos::CENTER, gridLinesVisible: false)

gridPane.add(node, columnIndex: 0, rowIndex: 0, colspan: 2, rowspan: 1)

assigning a value to colspan dont change anything

[enebo]

columnSpan: 2

colspan does seem to show up in the FX docs a lot but it is only for variable names. The property name is columnSpan.