iridescence property
      
      double
      get
      iridescence
      
    
    
    
Implementation
double get iridescence => _iridescence;
      
      set
      iridescence
      (double value) 
      
    
    
    
Implementation
set iridescence(double value ) {
	if (_iridescence > 0 != value > 0 ) {
		version ++;
	}
	_iridescence = value;
}