code: def to_undirected(graph):
      """Returns an undirected view of the graph `graph`.
  
      Identical to graph.to_undirected(as_view=True)
      Note that graph.to_undirected defaults to `as_view=False`
      while this function always provides a view.
      """
      return graph.to_undirected(as_view=True)
  
imports: from collections import Counter
  from itertools import chain
  import networkx
  from networkx.utils import not_implemented_for, pairwise
label_desc: Use image node_id 21 for calling a global function with example usage: to_undirected(graph) and returns: graph