elevation static method

Implementation

static List<BoxShadow> elevation(double elevation) {
  if (elevation <= 0) return none;
  if (elevation <= 1) return xs;
  if (elevation <= 2) return sm;
  if (elevation <= 4) return md;
  if (elevation <= 8) return lg;
  if (elevation <= 12) return xl;
  return xxl;
}