src/transformers/models/wav2vec2/modeling_wav2vec2.py/Wav2Vec2FeatureProjection/__init__
class Wav2Vec2FeatureProjection:    def __init__(self, config):
        super().__init__()
        self.layer_norm = nn.LayerNorm(config.conv_dim[-1], eps=config.layer_norm_eps)
        self.projection = nn.Linear(config.conv_dim[-1], config.hidden_size)
        self.dropout = nn.Dropout(config.feat_proj_dropout)