src/transformers/models/wav2vec2_conformer/modeling_wav2vec2_conformer.py/Wav2Vec2ConformerRelPositionalEmbedding/__init__
class Wav2Vec2ConformerRelPositionalEmbedding:    def __init__(self, config):
        super().__init__()
        self.max_len = config.max_source_positions
        self.d_model = config.hidden_size
        self.pe = None
        self.extend_pe(torch.tensor(0.0).expand(1, self.max_len))