UiKanbanSpecifier buildTodoKanban() {
    new UiKanbanSpecifier().ui {                                                                   (1)
        column 'HeaderStr', Style.ALIGN_CENTER, Gantt2Controller.&changeTodoProgression as MethodClosure, [newProgression: 0], {    (2)
            custom "Custom html code"                                                              (3)
            todos.forEach { Todo todo ->
                card todo, Gantt2Controller.&showTodo as MethodeClosure, todo.id, {                (4)
                    cardField todo.what_                                                           (5)
                    cardFieldRaw "Custom html code"                                                (6)
                    cardAction ActionIcon.SHOW * IconStyle.SCALE_DOWN, Gantt2Controller.&doSomething as MethodClosure, todo.id   (7)
                }
            }
        }
    }
}

@PostConstruct
void init() {
    TaackUiService.registerContextualMenuClosure(Todo, new UiMenuSpecifier().ui {               (8)
        menu 'Show Gantt', Gantt2Controller.&showGanttByTodo as MethodClosure, [id: this.params['id']]    (9)
    }
}