How to use the @ephox/boulder.FieldSchema.defaultedStringEnum function in @ephox/boulder

launch?: ContextFormLaunchButtonApi | ContextFormLaunchToggleButtonApi;
  commands: Array;
}

export interface ContextForm extends ContextBar {
  type: 'contextform';
  initValue: () => string;
  label: Option;
  launch: Option;
  commands: Array;
}

const contextBarFields = [
  FieldSchema.defaultedFunction('predicate', () => false),
  FieldSchema.defaultedStringEnum('scope', 'node', ['node', 'editor']),
  FieldSchema.defaultedStringEnum('position', 'selection', ['node', 'selection', 'line']),
];

const contextButtonSchema = ValueSchema.objOf(baseToolbarButtonFields.concat([
  FieldSchema.defaulted('type', 'contextformbutton'),
  FieldSchema.defaulted('primary', false),
  FieldSchema.strictFunction('onAction'),
  FieldSchema.state('original', Fun.identity)
]));

const contextToggleButtonSchema = ValueSchema.objOf(baseToolbarToggleButtonFields.concat([
  FieldSchema.defaulted('type', 'contextformbutton'),
  FieldSchema.defaulted('primary', false),
  FieldSchema.strictFunction('onAction'),
  FieldSchema.state('original', Fun.identity)
]));

label?: string;
  launch?: ContextFormLaunchButtonApi | ContextFormLaunchToggleButtonApi;
  commands: Array;
}

export interface ContextForm extends ContextBar {
  type: 'contextform';
  initValue: () => string;
  label: Option;
  launch: Option;
  commands: Array;
}

const contextBarFields = [
  FieldSchema.defaultedFunction('predicate', () => false),
  FieldSchema.defaultedStringEnum('scope', 'node', ['node', 'editor']),
  FieldSchema.defaultedStringEnum('position', 'selection', ['node', 'selection', 'line']),
];

const contextButtonSchema = ValueSchema.objOf(baseToolbarButtonFields.concat([
  FieldSchema.defaulted('type', 'contextformbutton'),
  FieldSchema.defaulted('primary', false),
  FieldSchema.strictFunction('onAction'),
  FieldSchema.state('original', Fun.identity)
]));

const contextToggleButtonSchema = ValueSchema.objOf(baseToolbarToggleButtonFields.concat([
  FieldSchema.defaulted('type', 'contextformbutton'),
  FieldSchema.defaulted('primary', false),
  FieldSchema.strictFunction('onAction'),
  FieldSchema.state('original', Fun.identity)
]));

onSetup: (api: DialogMenuButtonInstanceApi) => (api: DialogMenuButtonInstanceApi) => void;
}

export type DialogButton = DialogNormalButton | DialogMenuButton;

const baseButtonFields = [
  FieldSchema.field(
    'name',
    'name',
    FieldPresence.defaultedThunk(() => {
      return Id.generate('button-name');
    }),
    ValueSchema.string
  ),
  FieldSchema.optionString('icon'),
  FieldSchema.defaultedStringEnum('align', 'end', ['start', 'end']),
  FieldSchema.defaultedBoolean('primary', false),
  FieldSchema.defaultedBoolean('disabled', false)
];

export const dialogButtonFields = [
  ...baseButtonFields,
  FieldSchema.strictString('text')
];

const normalButtonFields = [
  FieldSchema.strictStringEnum('type', ['submit', 'cancel', 'custom']),
  ...dialogButtonFields
];

const menuButtonFields = [
  FieldSchema.strictStringEnum('type', ['menu']),