如何在oracle jet datepicker中设置一周的第一天

<input id="myDatePicker" type="text">

require(['ojs/ojbootstrap', 'knockout', 'ojs/ojknockout', 'ojs/ojdatetimepicker'], function (Bootstrap, ko) {
  function ViewModel() {
    var self = this;

    // 设置一周的第一天为星期一
    self.firstDayOfWeek = ko.observable("monday");

    // 初始化日期选择器
    self.datePickerOptions = {
      dayFormatter: null,
      weekDisplay: "number",
      firstDayOfWeek: self.firstDayOfWeek
    };
  }

  // 绑定ViewModel
  var viewModel = new ViewModel();
  ko.applyBindings(viewModel, document.getElementById('myDatePicker'));
});