borderRadius property

BorderRadius borderRadius

The border radius of the rounded corners.

Values are clamped so that horizontal and vertical radii sums do not exceed width/height.

This property is ignored if the shape is not BoxShape.rectangle.

The value null is treated like BorderRadius.zero.

Implementation 

BorderRadius get borderRadius => _borderRadius;
void borderRadius= (BorderRadius value)

Implementation 

set borderRadius(BorderRadius value) {
  if (borderRadius == value)
    return;
  _borderRadius = value;
  _markNeedsClip();
}