in src/main/java/com/microsoft/azure/functions/worker/binding/BindingDataStore.java [153:159]
private boolean isDataTargetValid(String name, Type target) {
if (!name.equals(RETURN_NAME)) {
if (!CoreTypeResolver.isValidOutputType(target)) { return false; }
target = CoreTypeResolver.getParameterizedActualTypeArgumentsType(target);
}
return true;
}