src/transformers/models/hubert/modeling_hubert.py/HubertFeatureProjection/forward
class HubertFeatureProjection:    def forward(self, hidden_states):
        # non-projected hidden states are needed for quantization
        hidden_states = self.layer_norm(hidden_states)
        hidden_states = self.projection(hidden_states)
        hidden_states = self.dropout(hidden_states)
        return hidden_states