code: def tile_nested(
      inputs: types.NestedTensor, multiple: int
  ) -> types.NestedTensor:
      """Tiles tensors in a nested structure along a new leading axis."""
      tile = functools.partial(tile_tensor, multiple=multiple)
      return tree.map_structure(tile, inputs)
  
imports: import functools
  from typing import List, Optional, Union
  from acme import types
  from acme.utils import tree_utils
  import sonnet
  import tensorflow
  import tree
label_desc: Use image node_id 6 for calling a global function with example usage: tile_nested(inputs, multiple) and returns: tree