code: def _validate_broadcasted_graph(graph, from_field, to_field):
      additional_message = "when broadcasting {} to {}".format(
          from_field, to_field
      )
      _validate_graph(graph, [from_field, to_field], additional_message)
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from graph_nets import _base
  from graph_nets import graphs
  from graph_nets import utils_tf
  import tensorflow
label_desc: Use image node_id 2 for calling a global function with example usage: _validate_broadcasted_graph(graph, from_field, to_field) without return types