src/transformers/models/canine/modeling_canine.py/CanineForQuestionAnswering/__init__
class CanineForQuestionAnswering:    def __init__(self, config):
        super().__init__(config)
        self.num_labels = config.num_labels

        self.canine = CanineModel(config)
        self.qa_outputs = nn.Linear(config.hidden_size, config.num_labels)

        self.init_weights()