SweetAlertOptions constructor
      
      SweetAlertOptions({ 
    
    
- bool? showCancelButton = false,
 - String? title,
 - String? subtitle,
 - SweetAlertOnPress? onPress,
 - Color? cancelButtonColor,
 - String? cancelButtonText,
 - Color? confirmButtonColor,
 - String? confirmButtonText,
 - SweetAlertStyle? style,
 
Implementation
SweetAlertOptions(
    {this.showCancelButton = false,
    this.title,
    this.subtitle,
    this.onPress,
    this.cancelButtonColor,
    this.cancelButtonText,
    this.confirmButtonColor,
    this.confirmButtonText,
    this.style});