code: protected void handleCollectionTypeNotAvailable(XCollectionLiteral literal, ITypeComputationState state, Class<?> clazz) {
  		for(XExpression element: literal.getElements()) {
  			state.withNonVoidExpectation().computeTypes(element);
  		}
  		state.acceptActualType(state.getReferenceOwner().newUnknownTypeReference(clazz.getName()));
  	}
docs: Process all children and assign an unknown type to the literal.