Rect.fromJson constructor
Creates a new instance from a JSON map.
Implementation
factory Rect.fromJson(Map<String, dynamic> json) {
return Rect(
x: (json['x'] as num).toDouble(),
y: (json['y'] as num).toDouble(),
width: (json['width'] as num).toDouble(),
height: (json['height'] as num).toDouble(),
);
}