src/transformers/models/gpt_neo/modeling_gpt_neo.py/GPTNeoMLP/forward
class GPTNeoMLP:    def forward(self, hidden_states):
        hidden_states = self.c_fc(hidden_states)
        hidden_states = self.act(hidden_states)
        hidden_states = self.c_proj(hidden_states)
        hidden_states = self.dropout(hidden_states)
        return hidden_states