thanks for the quick reply.
Maybe interesting for others finding this thread:
I now quickly implemented a override method for setattr_argument to my custom experiment class that adds the processor to a dict automatically.
class _MyExperiment(EnvExperiment):
def __init__(self, *args, **kwargs):
self.arg_info = {}
super().__init__(*args, **kwargs)
def setattr_argument(self, key, processor, *args, **kwargs):
super().setattr_argument(key,processor, *args, **kwargs)
self.arg_info[key] = processor