Flyte enables production-grade orchestration for machine learning workflows and data processing created to accelerate local workflows to production.

Flyte

Hello all
I'm getting this error when trying to create a task with custom object:
```ValueError: Only generic univariate typing.List[T] type is supported.```
I tried to use the example in doc, <https://flyte--943.org.readthedocs.build/projects/cookbook/en/943/auto/core/type_system/custom_objects.html>

In this case, I adapted the example to create a custom object, and I'm trying to create a map task that receives a list of this objects

The custom class
```@dataclass_json
@dataclass
class Test_custom_object(object):
    flyte_file: FlyteFile
    test_data: str```
A snippet from the class
```@task(requests=Resources(cpu='1', mem='600Mi'))
def test_task(file: Datum) -&gt; float:
    print(file.flyte_file)```
Snippet from workflow
```all_samples = map_task(
       sample_task,
       metadata=TaskMetadata(retries=1)
    )(file=samples)

map_task(
        test_task,
        metadata=TaskMetadata(retries=1)
    )(file=all_samples)```

<@U04HLNJMXJA>, which task is throwing the error? And what's the type of `all_samples` list elements?

The error is coming from the latter map task, and `all_samples` is returning me a list of `Test_custom_object`