Implementation
set renderBoxModel(RenderBoxModel? value) {
if (value == null) {
_renderReplaced = null;
_renderLayoutBox = null;
_renderWidget = null;
_renderSVG = null;
} else if (value is RenderReplaced) {
_renderReplaced = value;
} else if (value is RenderLayoutBox) {
_renderLayoutBox = value;
} else if (value is RenderWidget) {
_renderWidget = value;
} else if (value is RenderSVGShape || value is RenderSVGContainer || value is RenderSVGText) {
_renderSVG = value;
} else {
if (!kReleaseMode) throw FlutterError('Unknown RenderBoxModel value.');
}
}