src/transformers/models/markuplm/modeling_markuplm.py/MarkupLMAttention/__init__
class MarkupLMAttention:    def __init__(self, config, position_embedding_type=None):
        super().__init__()
        self.self = MarkupLMSelfAttention(config, position_embedding_type=position_embedding_type)
        self.output = MarkupLMSelfOutput(config)
        self.pruned_heads = set()