merge method
Implementation
DateTimeElementStyle merge(DateTimeElementStyle mergeWith) {
return DateTimeElementStyle(
textStyle: textStyle ?? mergeWith.textStyle,
hintTextStyle: hintTextStyle ?? mergeWith.hintTextStyle,
width: width ?? mergeWith.width,
height: height ?? mergeWith.height,
background: background ?? mergeWith.background,
border: border ?? mergeWith.border,
borderRadius: borderRadius ?? mergeWith.borderRadius,
gradient: gradient ?? mergeWith.gradient,
labelStyle: labelStyle ?? mergeWith.labelStyle,
);
}