docstr: Set input files that have been created by the `cugraph.gnn.BulkSampler`
  Parameters
  ----------
  input_directory: str
      input_directory which contains all the files that will be
      loaded by HeterogenousBulkSamplerDataset
  input_file_paths: List[str]
      File names that will be loaded by the HeterogenousBulkSamplerDataset
docstr_tok: ["Set","input","files","that","have","been","created","by","the","`","cugraph.gnn.BulkSampler","`","Parameters","--","--","--","--","--","input_directory",":","str","input_directory","which","contains","all","the","files","that","will","be","loaded","by","HeterogenousBulkSamplerDataset","input_file_paths",":","List","[","str","]","File","names","that","will","be","loaded","by","the","HeterogenousBulkSamplerDataset"]
code: def set_input_files(
      self,
      input_directory: Optional[str] = None,
      input_file_paths: Optional[List[str]] = None,
  ):
      """
      Set input files that have been created by the `cugraph.gnn.BulkSampler`
      Parameters
      ----------
      input_directory: str
          input_directory which contains all the files that will be
          loaded by HeterogenousBulkSamplerDataset
      input_file_paths: List[str]
          File names that will be loaded by the HeterogenousBulkSamplerDataset
      """
      _set_input_files(
          self,
          input_directory=input_directory,
          input_file_paths=input_file_paths,
      )
  
imports: from __future__ import annotations
  from typing import Tuple, Dict, Optional, List, Union
  import os
  import cudf
  from cugraph.utilities.utils import import_optional
  from cugraph_dgl.dataloading.utils.sampling_helpers import create_homogeneous_sampled_graphs_from_dataframe, create_heterogeneous_sampled_graphs_from_dataframe, create_homogeneous_sampled_graphs_from_dataframe_csc
label_desc: Use image node_id 4 for calling the HeterogenousBulkSamplerDataset obj's underlying member method code with example usage: obj.set_input_files(input_directory, input_file_paths) without return types