fun EventTarget.togglebutton(text: String? = null, group: ToggleGroup? = getToggleGroup(), selectFirst: Boolean = true, value: Any? = null, op: ToggleButton.() -> Unit = {}): <ERROR CLASS>
Create a togglebutton inside the current or given toggle group. The optional value parameter will be matched against
the extension property selectedValueProperty() on Toggle Group. If the #ToggleGroup.selectedValueProperty is used,
its value will be updated to reflect the value for this radio button when its selected.
Likewise, if the selectedValueProperty of the ToggleGroup is updated to a value that matches the value for this
togglebutton, it will be automatically selected.
fun EventTarget.togglebutton(text: ObservableValue<String>? = null, group: ToggleGroup? = getToggleGroup(), selectFirst: Boolean = true, value: Any? = null, op: ToggleButton.() -> Unit = {}): <ERROR CLASS>