merge method
Implementation
ZeroSwitchStyle merge(ZeroSwitchStyle? other) {
if (other == null) return this;
return copyWith(
activeColor: other.activeColor,
inactiveColor: other.inactiveColor,
activeThumbColor: other.activeThumbColor,
inactiveThumbColor: other.inactiveThumbColor,
thumbSize: other.thumbSize,
);
}