code: def __len__(self):
      return self.size
  
file_path: labml/client/labml/internal/monitor/mix.py
imports: from typing import Tuple, Union, Callable, Any, List, cast, Sized, TYPE_CHECKING, Iterator
label_desc: Use image node_id 3 for calling the SplitIterator obj's underlying member method code with example usage: obj.__len__() and returns: self