Optional<?> mappedAttributeOpt = mappingStrategy.mapAttribute(result);
Preconditions.checkState(mappedAttributeOpt.isPresent(), "Unable to map return value %s as %s", result, returnType.getOpenType());
Optional<?> mappedAttributeOpt = mappingStrategy.mapAttribute(result);
Preconditions.checkState(mappedAttributeOpt.isPresent(), "Unable to map return value %s as %s", result, returnType.getOpenType());