anchor.diff:      }
   
       Widget propertyEditor = Column(
  +      crossAxisAlignment: CrossAxisAlignment.stretch,
         children: <Widget>[
           Container(
             color: Theme.of(context).colorScheme.secondary,
  
positive.code:   late ParticleWorld _particleWorld;
    late TabController _tabController;
    late Color _backgroundColor;
  
    @override
    void initState() {
  
negative.code:             controller: _tabController,
              children: <Widget>[
                ListView(
                  controller: _presetsScrollController,
                  padding: EdgeInsets.zero,
                  children: presets,
                ),
                ListView(
                  controller: _emissionScrollController,
                  padding: const EdgeInsets.symmetric(vertical: 16.0),
                  children: <Widget>[
                    PropertyDouble(
  