toJson method
Implementation
core.Map<core.String, core.dynamic> toJson() => {
if (bulletStyle != null) 'bulletStyle': bulletStyle!,
if (glyph != null) 'glyph': glyph!,
if (listId != null) 'listId': listId!,
if (nestingLevel != null) 'nestingLevel': nestingLevel!,
};