fracOp property Null safety
final
        Implementation
static final NormalOperation fracOp = NormalOperation.floatOnly(
    floatCalc: (Model m) {
      m.resultX = m.x.fracOp();
    },
    name: 'FRAC');static final NormalOperation fracOp = NormalOperation.floatOnly(
    floatCalc: (Model m) {
      m.resultX = m.x.fracOp();
    },
    name: 'FRAC');