code: private String getSourceMultiplicity(final Cardinality cardinality) {
  
  		switch (cardinality) {
  
  			case OneToOne:
  			case OneToMany:
  				return "1";
  
  			case ManyToOne:
  			case ManyToMany:
  				return "*";
  		}
  
  		return null;
  	}
docs: ----- private methods -----