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