code: def ToFloat():
      """Returns a layer that changes the dtype of a tensor to `float32`."""
      return Fn("ToFloat", lambda x: x.astype(np.float32))
  
imports: from absl import logging
  import numpy
  import tensorflow
  from trax import fastmath
  from trax.fastmath import numpy
  from trax.layers import base
  from trax.layers import initializers
  from trax.layers.assert_shape import assert_shape
  from trax.layers.base import Fn
label_desc: Use image node_id 6 for calling a global function with example usage: ToFloat() and returns: Fn