toValue method
Implementation
String toValue() {
switch (this) {
case AssociationEdgeType.contributedTo:
return 'ContributedTo';
case AssociationEdgeType.associatedWith:
return 'AssociatedWith';
case AssociationEdgeType.derivedFrom:
return 'DerivedFrom';
case AssociationEdgeType.produced:
return 'Produced';
}
}