src/transformers/models/table_transformer/modeling_table_transformer.py/TableTransformerLearnedPositionEmbedding/__init__
class TableTransformerLearnedPositionEmbedding:    def __init__(self, embedding_dim=256):
        super().__init__()
        self.row_embeddings = nn.Embedding(50, embedding_dim)
        self.column_embeddings = nn.Embedding(50, embedding_dim)