src/transformers/debug_utils.py/DebugUnderflowOverflow/batch_start_frame
class DebugUnderflowOverflow:    def batch_start_frame(self):
        self.expand_frame(f"\n\n{self.prefix} *** Starting batch number={self.batch_number} ***")
        self.expand_frame(f"{'abs min':8} {'abs max':8} metadata")