code: def flatten_with_joined_string_paths(
      structure, separator="/", expand_composites=False
  ):
      """Returns a list of (string path, data element) tuples.
  
      The order of tuples produced matches that of `nest.flatten`. This allows you
      to flatten a nested structure while keeping information about where in the
      structure each data element was located. See `nest.yield_flat_paths`
      for more information.
  
      Args:
        structure: the nested structure to flatten.
        separator: string to separate levels of hierarchy in the results, defaults
          to '/'.
        expand_composites: Python bool included for compatibility; `True` values
          are not supported.
  
      Returns:
        A list of (string, data element) tuples.
      """
  
      def stringify_and_join(path_elements):
          return separator.join(
              str(path_element) for path_element in path_elements
          )
  
      if expand_composites:
          raise NotImplementedError(
              "`expand_composites=True` is not supported in JAX."
          )
      return [
          (stringify_and_join(pe), v)
          for pe, v in dm_tree.flatten_with_path(structure)
      ]
  
imports: import collections
  from collections import abc
  import types
  import tree
label_desc: Use image node_id 4 for calling a global function with example usage: flatten_with_joined_string_paths(structure, separator, expand_composites) and returns: unknown, separator