src/transformers/models/deformable_detr/modeling_deformable_detr.py/DeformableDetrLearnedPositionEmbedding/__init__
class DeformableDetrLearnedPositionEmbedding:    def __init__(self, embedding_dim=256):
        super().__init__()
        self.row_embeddings = nn.Embedding(50, embedding_dim)
        self.column_embeddings = nn.Embedding(50, embedding_dim)