strength property
      
      double
      get
      strength
      
    
    
    
Implementation
double get strength {
  return _strength!;
}
      
      set
      strength
      (double value) 
      
    
    
    
Implementation
set strength(double value) {
  if (value == _strength) {
    return;
  }
  _strength = value;
  markDirty();
}