code: def visit_batch_started(self, signal: Signal) -> None:
      ...
  
file_path: neptune-client/src/neptune/internal/signals_processing/signals.py
imports: from abc import abstractmethod
  from dataclasses import dataclass
label_desc: Use image node_id 1 for calling the SignalsVisitor obj's underlying member method code with example usage: obj.visit_batch_started(signal) without return types