src/transformers/data/data_collator.py/DataCollatorForSOP/__init__
class DataCollatorForSOP:    def __init__(self, *args, **kwargs):
        warnings.warn(
            "DataCollatorForSOP is deprecated and will be removed in a future version, you can now use "
            "DataCollatorForLanguageModeling instead.",
            FutureWarning,
        )