[<Ray component: Core|RLlib|etc...>] Some modules are missing

[rifnyrachman]

What happened + What you expected to happen

I no longer could find rllib_maml. Also, when I imported it locally, there are several modules which are not found as shown on picture. Could you please advise where was it moved or if it's been removed, which Ray version should I install to restore this module?

Versions / Dependencies

2.38.0

Reproduction script

from ray.rllib.execution.common import (
STEPS_SAMPLED_COUNTER,
STEPS_TRAINED_COUNTER,
STEPS_TRAINED_THIS_ITER_COUNTER,
_get_shared_metrics,
)
from ray.rllib.execution.metric_ops import CollectMetrics

Issue Severity

High: It blocks me from completing my task.

[simonsays1980]

@rifnyrachman Thanks for raising this issue. We moved man of our old stack algorithms to rllib_contrib last year. This year, we even removed this rllib_contrib module from ray (see this PR) as it does not conform anymore with the new API stack. You will need to install an older Ray version (at least ray<=2.37.0).

Note, to use rllib_contrib you need to follow the guidelines given in this module: https://github.com/ray-project/ray/tree/releases/2.37.0/rllib_contrib/maml