Optional<ChoiceCaseNode> detectedCaseOpt = SchemaUtils.detectCase(schema, child);
DataValidationException.checkLegalChild(detectedCaseOpt.isPresent(), child.getIdentifier(), schema);
validator = new DataNodeContainerValidator(detectedCaseOpt.get());
Optional<ChoiceCaseNode> detectedCaseOpt = SchemaUtils.detectCase(schema, child);
DataValidationException.checkLegalChild(detectedCaseOpt.isPresent(), child.getIdentifier(), schema);
validator = new DataNodeContainerValidator(detectedCaseOpt.get());