toJson method
Implementation
core.Map<core.String, core.dynamic> toJson() => {
if (bottomPixels != null) 'bottomPixels': bottomPixels!,
if (leftPixels != null) 'leftPixels': leftPixels!,
if (rightPixels != null) 'rightPixels': rightPixels!,
if (topPixels != null) 'topPixels': topPixels!,
};