retorno= (this.getName() == null);
equalsResult= (this.getName() == null);
	public boolean equals(Object obj)	{		boolean retorno= false;		if (obj instanceof IModality)		{			IModality modality= (IModality) obj;			if (modality.getName() == null)				retorno= (this.getName() == null);			else				retorno= this.getName().equalsIgnoreCase(modality.getName());		}		return false;	}