docs: static String getDomainName(OperationContext context, ModelNode model, String child) throws OperationFailedException {
          if (!model.hasDefined(CommonAttributes.EXPOSE_MODEL)) {
              return null;
          }
          if (!model.get(CommonAttributes.EXPOSE_MODEL).hasDefined(child)) {
              return null;
          }
          ModelNode childModel = model.get(CommonAttributes.EXPOSE_MODEL, child);
          return ExposeModelResource.getDomainNameAttribute(child).resolveModelAttribute(context, childModel).asString();
      }