src/transformers/models/biogpt/modeling_biogpt.py/BioGptForCausalLM/__init__
class BioGptForCausalLM:    def __init__(self, config):
        super().__init__(config)

        self.biogpt = BioGptModel(config)
        self.output_projection = nn.Linear(config.hidden_size, config.vocab_size, bias=False)

        # Initialize weights and apply final processing
        self.post_init()