Check what genetic models that are found and return them as a set.
        
        Args:
            genetic_models  : A string with genetic models
        
        Yields:
             correct_model_names  : A set with the correct model names

def get_models(self, genetic_models):
        """
        Check what genetic models that are found and return them as a set.
        
        Args:
            genetic_models  : A string with genetic models
        
        Yields:
             correct_model_names  : A set with the correct model names
        """
        correct_model_names = set()
        genetic_models = genetic_models.split(';')
        correct_model_names = set()
        for model in genetic_models:
            # We need to allow typos
            if model in self.legal_ar_hom_names:
                model = 'AR_hom'
            elif model in self.legal_ar_hom_dn_names:
                model = 'AR_hom_dn'
            elif model in self.legal_ad_names:
                model = 'AD_dn'
            elif model in self.legal_compound_names:
                model = 'AR_comp'
            elif model in self.legal_x_names:
                model = 'X'
            elif model in self.legal_na_names:
                model = 'NA'
            else:
                self.logger.warning("Incorrect model name: {0}."\
                                    " Ignoring model.".format(model))
            correct_model_names.add(model)
        return correct_model_names