merge method
merge two ZeroCardStyle
Implementation
ZeroCardStyle merge(ZeroCardStyle? otherStyle) {
if (otherStyle == null) return this;
return copyWith(
backgroundColor: otherStyle.backgroundColor,
elevation: otherStyle.elevation,
borderRadius: otherStyle.borderRadius,
side: otherStyle.side,
shadowColor: otherStyle.shadowColor,
margin: otherStyle.margin,
borderOnForeground: otherStyle.borderOnForeground,
);
}