src/transformers/models/realm/modeling_realm.py/RealmReader/__init__
class RealmReader:    def __init__(self, config):
        super().__init__(config)
        self.num_labels = config.num_labels

        self.realm = RealmBertModel(config)
        self.cls = RealmOnlyMLMHead(config)
        self.qa_outputs = RealmReaderProjection(config)

        self.post_init()