src/transformers/models/decision_transformer/modeling_decision_transformer.py/DecisionTransformerGPT2MLP/forward
class DecisionTransformerGPT2MLP:    def forward(self, hidden_states: Optional[Tuple[torch.FloatTensor]]) -> torch.FloatTensor:
        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