Caused by: java.lang.RuntimeException: Could not serialize EObject via backtracking.
Constraint: null ((annotations+=DslAnnotation* incomplete?='incomplete'? | incomplete?='incomplete'? usingDeprecatedAtSyntax?='@') name=ID prototype=[InstanceDefinition|FQN]? entity=[Entity|FQN]? attributeDefinitions+=AttributeDefinition* | (annotations+=DslAnnotation* inherit='inherited' incomplete?='incomplete'? prototype=[InstanceDefinition|ID] | inherit='specialized' prototype=[InstanceDefinition|ID] (attributeDefinitions+=AttributeDefinitionAbbrev | attributeDefinitions+=AttributeDefinitionPlain)) | annotations+=DslAnnotation* inherit='specialized' incomplete?='incomplete'? prototype=[InstanceDefinition|ID] entity=[Entity|FQN]? attributeDefinitions+=AttributeDefinition*) null
Values: inherit(1), prototype(1), incomplete(0-1), resolving(0-1), usingDeprecatedAtSyntax(0-1)
Semantic Object: DomainInstanceModel.bundleDefinitionList[1]->BundleDefinition'b1'.instanceList[0]->InstanceDefinition
Context: SubInstanceDefinitionInBundle

annotations+=DslAnnotation* inherit='inherited' incomplete?='incomplete'? prototype=[InstanceDefinition|ID]

Root:
	prototype=Prototype
	model=Model
;

Prototype:
	name=FQN
;
Model:
"a" 

(
	(
		annotations+=DslAnnotation* incomplete?='incomplete'? 
		| incomplete?='incomplete'? usingDeprecatedAtSyntax?='@'
	) 
	name=ID 
	prototype=[Prototype|FQN]?
	entity=FQN? 
	attributeDefinitions+=AttributeDefinition* 

	| 

	(
		annotations+=DslAnnotation* 
		inherit='inherited' 
		incomplete?='incomplete'? 
		prototype=[Prototype|ID]

		| 

		inherit='specialized' 
		prototype=[Prototype|ID]
		(
		attributeDefinitions+=AttributeDefinitionAbbrev 
		| attributeDefinitions+=AttributeDefinitionPlain
		)
	) 

	| 

	annotations+=DslAnnotation* 
	inherit='specialized' 
	incomplete?='incomplete'? 
	prototype=[Prototype|ID]
	entity=FQN? "#"
	attributeDefinitions+=AttributeDefinition*
) 


"b";

DslAnnotation:
	"@" name=ID "("")"
;

FQN: ID ("."ID)*;

AttributeDefinition:
	"attr" name=ID
;

AttributeDefinitionAbbrev:
	"a" name=ID
;

AttributeDefinitionPlain:
	"ax" name=ID
;

class Main {
	
	def static void main(String[] args) {
		val Injector i = new MyDslStandaloneSetup().createInjectorAndDoEMFRegistration
		val ISerializer s = i.getInstance(ISerializer)
		val p = MyDslFactory.eINSTANCE.createPrototype => [
			name = "a.b.c"
		]
		val m = MyDslFactory.eINSTANCE.createRoot => [
				prototype = p
			model = MyDslFactory.eINSTANCE.createModel => [
				inherit = "inherited"
				prototype = p
				incomplete = false
			]
			
			]
		val rs = i.getInstance(ResourceSet)
		val r = rs.createResource(URI.createURI("dummy.mydsl1"))
		r.contents += m
		println(s.serialize(
			m
		))
	}
	
	
}

	protected Iterable<AbstractElement> findValidValueAssignments(EObject semanticObj,
			Iterable<AbstractElement> assignedElements, Object value) {
		// keywords have precedence over everything else
		for (AbstractElement ass : assignedElements)
			if (ass instanceof Keyword && keywordSerializer.isValid(semanticObj, (Keyword) ass, value, null))
				return Collections.singletonList(ass);

		// now check the remaining assignments
...

	protected Iterable<AbstractElement> findValidValueAssignments(EObject semanticObj,
			Iterable<AbstractElement> assignedElements, Object value) {
		List<AbstractElement> result = Lists.newArrayList();
		for (AbstractElement ass : assignedElements)
			if (ass instanceof Keyword && keywordSerializer.isValid(semanticObj, (Keyword) ass, value, null))
				result.add(ass);
		// keywords have precedence over everything else
		if (!result.isEmpty())
			return result;

		// now check the remaining assignments
...

protected Set<AbstractElement> findValidValueAssignments(EObject semanticObj,
			Iterable<AbstractElement> assignedElements, Object value) {
		Set<AbstractElement> result = Sets.newLinkedHashSet();
		for (AbstractElement ass : assignedElements) {
			if (ass instanceof Keyword && keywordSerializer.isValid(semanticObj, (Keyword) ass, value, null))
				result.add(ass);
			else if (ass instanceof RuleCall) {
				RuleCall rc = (RuleCall) ass;
				if (rc.getRule() instanceof EnumRule) {
					if (enumLiteralSerializer.isValid(semanticObj, rc, value, null))
						result.add(ass);
				} else if (valueSerializer.isValid(semanticObj, rc, value, null))
					result.add(ass);
			}
		}
		return result;
	}

  inherit='specialized'