refreshLayerModel method
      
void
refreshLayerModel()
      
     
    
    
Implementation
void refreshLayerModel() {
  final List<LayerModel> _tempLayers = [];
  for (final LayerModel layer in layers) {
    _tempLayers.add(LayerModel(
      points: layer.points,
      viscosity: layer.viscosity,
      touchForce: layer.touchForce,
      forceLimit: layer.forceLimit,
      color: layer.color,
    ));
    if (layer.color == null) {
      print(layer.color);
    }
  }
  layers = _tempLayers;
}