isUniform property
Whether all the sides of the border (outside and inside) are identical. Uniform borders are typically more efficient to paint.
Implementation
bool get isUniform {
return _allSidesMatch<Color>((BorderSide side) => side.color) &&
_allSidesMatch<double>((BorderSide side) => side.width) &&
_allSidesMatch<BorderStyle>((BorderSide side) => side.style);
}