lastXC property Null safety

Complex lastXC

Implementation

Complex get lastXC => Complex(_lastX.asDouble, _lastXImaginary!.asDouble);

void lastXC=(Complex v)

set lastXC(Complex v) {
  _lastX = Value.fromDouble(v.real);
  _lastXImaginary = Value.fromDouble(v.imaginary);
  needsSave = true;
}