class_docstr: Dataloader which wraps another dataloader and skip `None` batch data.
  
  Attribute accesses are passed to the wrapped dataloader.
code: def __iter__(self) -> Iterator[Any]:
      self._iter = iter(self.dataloader)
      return self
  
imports: from typing import Any, Iterable, Iterator
  from .dataloader_wrapper import DataloaderWrapper
label_desc: Use image node_id 2 for calling the DataloaderSkipNoneWrapper obj's underlying member method code with example usage: obj.__iter__() and returns: self