toJson method
Implementation
core.Map<core.String, core.dynamic> toJson() => {
if (borderStyle != null) 'borderStyle': borderStyle!,
if (columnCount != null) 'columnCount': columnCount!,
if (items != null) 'items': items!,
if (onClick != null) 'onClick': onClick!,
if (title != null) 'title': title!,
};