interface PickerOptions {
  columns: PickerColumn[];
  buttons?: PickerButton[];
  cssClass?: string | string[];
  showBackdrop?: boolean;
  backdropDismiss?: boolean;
  animated?: boolean;
  mode?: Mode;
  keyboardClose?: boolean;
  id?: string;
  htmlAttributes?: { [key: string]: any };
  enterAnimation?: AnimationBuilder;
  leaveAnimation?: AnimationBuilder;
}