How to use the @covalent/dynamic-forms.TdDynamicElement.Checkbox function in @covalent/dynamic-forms

const isValid: boolean = control.value.length <= 2;
            return !isValid ? { invalidChips: true } : undefined;
          },
        },
      ],
    },
  ];

  elementOptions: any[] = [
    TdDynamicElement.Input,
    TdDynamicType.Number,
    TdDynamicElement.Datepicker,
    TdDynamicElement.Password,
    TdDynamicElement.Textarea,
    TdDynamicElement.Slider,
    TdDynamicElement.Checkbox,
    TdDynamicElement.SlideToggle,
    TdDynamicElement.FileInput,
  ];

  showDynamicCode: boolean = false;

  type: any;

  count: number = 2;

  customValidationElements: ITdDynamicElementConfig[] = [
    {
      name: 'evenElement',
      label: 'Even Number',
      type: TdDynamicType.Number,
      validators: [

{
      name: 'boolean',
      label: 'Boolean Label',
      type: TdDynamicType.Boolean,
      hint: 'this is a boolean',
      default: false,
    },
    {
      name: 'slide-toggle',
      type: TdDynamicElement.SlideToggle,
      hint: 'this is a slide toggle',
      default: true,
    },
    {
      name: 'checkbox',
      type: TdDynamicElement.Checkbox,
      hint: 'this is a checkbox',
    },
  ];

  arrayElements: ITdDynamicElementConfig[] = [
    {
      name: 'array',
      type: TdDynamicType.Array,
      selections: ['Test1', 'Test2', 'Test3', 'Test4'],
      default: 'Test1',
    },
    {
      name: 'required-select',
      type: TdDynamicElement.Select,
      selections: ['Test1', 'Test2', 'Test3', 'Test4'],
      required: true,

{
      name: 'boolean',
      label: 'Boolean Label',
      type: TdDynamicType.Boolean,
      hint: 'this is a boolean',
      default: false,
    },
    {
      name: 'slide-toggle',
      type: TdDynamicElement.SlideToggle,
      hint: 'this is a slide toggle',
      default: true,
    },
    {
      name: 'checkbox',
      type: TdDynamicElement.Checkbox,
      hint: 'this is a checkbox',
    },
  ];

  arrayElements: ITdDynamicElementConfig[] = [
    {
      name: 'array',
      type: TdDynamicType.Array,
      selections: ['Test1', 'Test2', 'Test3', 'Test4'],
      default: 'Test1',
    },
    {
      name: 'required-select',
      type: TdDynamicElement.Select,
      selections: ['Test1', 'Test2', 'Test3', 'Test4'],
      required: true,

let isValid: boolean = control.value.length <= 2;
            return !isValid ? { invalidChips: true } : undefined;
          },
        },
      ],
    },
  ];

  elementOptions: any[] = [
    TdDynamicElement.Input,
    TdDynamicType.Number,
    TdDynamicElement.Datepicker,
    TdDynamicElement.Password,
    TdDynamicElement.Textarea,
    TdDynamicElement.Slider,
    TdDynamicElement.Checkbox,
    TdDynamicElement.SlideToggle,
    TdDynamicElement.FileInput,
  ];

  showDynamicCode: boolean = false;

  type: any;

  count: number = 2;

  customValidationElements: ITdDynamicElementConfig[] = [
    {
      name: 'evenElement',
      label: 'Even Number',
      type: TdDynamicType.Number,
      validators: [