Google Chart，ControlWrapper 更改占位符

Question

如何更改“选择一个值”文本的名称？ 我试过它更改默认或占位符选项，但该文本的值仍然没有改变。请帮助我

sleep(500).then(() => {


                        var dashboard = new google.visualization.Dashboard(
                             document.getElementById('dashboard_curso')
                        );

                        var donutRangeSlider = new google.visualization.ControlWrapper({
                            'controlType': 'CategoryFilter',
                            'containerId': 'filter_div_curso',
                            'options': {
                                'filterColumnLabel': 'Curso',
                                'ui': {
                                    'labelStacking': 'vertical',
                                    'placeholder': 'Donuts eaten per person',
                                    label: 'Seleccione Curso',
                                    default: 'Hola Mundo'


                                }
                            }
                        });

                        var data = google.visualization.arrayToDataTable(JSON.parse(Base64.decode($('#curso_1').data('json'))));

                                    var chart = new google.visualization.ChartWrapper({
                                        'chartType': 'ColumnChart',
                                        'containerId': 'curso_1',
                                        'options': {
                                            title: 'Asistencia por curso',
                                            vAxis: {title: '',viewWindow: { max: 1 }},
                                            hAxis: {title: 'Cursos'},
                                            isStacked: 'percent',

                                            legend: { position: 'top', maxLines: 3 },

                                            series: {
                                                0:{color:'rgb(16, 150, 24)'},
                                                1:{color:'rgb(219, 68, 55)'},
                                                2:{color:'rgb(133, 133, 133)'},

                                            }
                                        }
                                    });

                        dashboard.bind(donutRangeSlider, chart);
                        dashboard.draw(data);






                });

你必须勇敢地背叛 de la lista