toOptionsJSON method
Implementation
@override
void toOptionsJSON(StringBuffer buffer) {
super.toOptionsJSON(buffer);
if (color != null) {
buffer.writeAll(['"color":', jsonEncode(color), ','], '');
}
if (size != null) {
buffer.writeAll(['"size":', size, ','], '');
}
if (visible != null) {
buffer.writeAll(['"visible":', jsonEncode(visible), ','], '');
}
}