round method Null safety
Round entries in this.
Implementation
void round() {
_v4storage[0] = _v4storage[0].roundToDouble();
_v4storage[1] = _v4storage[1].roundToDouble();
_v4storage[2] = _v4storage[2].roundToDouble();
_v4storage[3] = _v4storage[3].roundToDouble();
}