class_docstr: Transformer that returns the sum all series as one series.
code: def _param_names(self) -> Tuple[str, ...]:
      return tuple()
  
imports: from typing import Any, Callable, Dict, Optional, Tuple, Union
  import pandas
  from sklearn.decomposition import PCA
  from .._transformer_base import _NonTrainableMultivariateTransformer, _TrainableMultivariateTransformer
label_desc: Use image node_id 2 for calling the SumAll obj's underlying member method code with example usage: obj._param_names() and returns: tuple