code: def ensure_valid_dtype(input_graph, vertex_pair):
      vertex_dtype = input_graph.edgelist.edgelist_df.dtypes[0]
      vertex_pair_dtypes = vertex_pair.dtypes
  
      if (
          vertex_pair_dtypes[0] != vertex_dtype
          or vertex_pair_dtypes[1] != vertex_dtype
      ):
          warning_msg = (
              "Jaccard requires 'vertex_pair' to match the graph's 'vertex' type. "
              f"input graph's vertex type is: {vertex_dtype} and got "
              f"'vertex_pair' of type: {vertex_pair_dtypes}."
          )
          warnings.warn(warning_msg, UserWarning)
          vertex_pair = vertex_pair.astype(vertex_dtype)
  
      return vertex_pair
  
file_path: cugraph/python/cugraph/cugraph/link_prediction/jaccard.py
imports: from cugraph.utilities import ensure_cugraph_obj_for_nx, df_edge_score_to_dictionary, renumber_vertex_pair
  import cudf
  import warnings
  from typing import Union, Iterable
  from pylibcugraph import jaccard_coefficients
  from pylibcugraph import ResourceHandle
  from cugraph.structure import Graph
  from cugraph.utilities.utils import import_optional
label_desc: Use image node_id 1 for calling a global function with example usage: ensure_valid_dtype(input_graph, vertex_pair) and returns: vertex_pair