code: def _InsertAxes12():
      """Returns a layer that inserts two internal size-1 axes into an array."""
      return tl.Fn(
          "InsertAxes12",
          lambda x: jnp.reshape(x, (x.shape[0], 1, 1, x.shape[1])),
      )
  
file_path: trax/trax/models/reformer/reformer.py
imports: from trax import layers
  from trax.fastmath import numpy
  from trax.models.research import configurable_transformer
label_desc: Use image node_id 7 for calling a global function with example usage: _InsertAxes12() and returns: tl