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])),
      )
  
imports: import functools
  from trax import layers
  from trax.fastmath import numpy
  from trax.models.reformer import reformer
  from trax.models.research import configurable_transformer
  from trax.models.research import transformer2
label_desc: Use image node_id 2 for calling a global function with example usage: _InsertAxes12() and returns: tl