code: def _combined_dim(dims):
      return mtf.Dimension(dims[0].name, mtf.Shape(dims).size)
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import mesh_tensorflow
  import tensorflow.compat.v1
label_desc: Use image node_id 4 for calling a global function with example usage: _combined_dim(dims) and returns: mtf