padding method
Implementation
Padding padding(
{double left: 0,
double top: 0,
double right: 0,
double bottom: 0,
vertical,
horizontal}) =>
Padding(
padding: vertical != null || horizontal != null
? EdgeInsets.symmetric(
vertical: vertical ?? 0, horizontal: horizontal ?? 0)
: EdgeInsets.only(
left: left, top: top, right: right, bottom: bottom),
child: this,
);