toJson method
Implementation
core.Map<core.String, core.dynamic> toJson() => {
if (altText != null) 'altText': altText!,
if (color != null) 'color': color!,
if (disabled != null) 'disabled': disabled!,
if (icon != null) 'icon': icon!,
if (onClick != null) 'onClick': onClick!,
if (text != null) 'text': text!,
};