Implementation
set apply(NikuRadio? v) {
if (v == null) return;
value = v.value ?? value;
groupValue = v.groupValue ?? groupValue;
onChanged = v.onChanged ?? onChanged;
mouseCursor = v.mouseCursor ?? mouseCursor;
toggleable = v.toggleable ?? toggleable;
activeColor = v.activeColor ?? activeColor;
fillColorState = v.fillColorState ?? fillColorState;
materialTapTargetSize = v.materialTapTargetSize ?? materialTapTargetSize;
visualDensity = v.visualDensity ?? visualDensity;
focusColor = v.focusColor ?? focusColor;
hoverColor = v.hoverColor ?? hoverColor;
overlayColorState = v.overlayColorState ?? overlayColorState;
splashRadius = v.splashRadius ?? splashRadius;
focusNode = v.focusNode ?? focusNode;
autofocus = v.autofocus ?? autofocus;
$parent..$merge(v.$parent);
}