code: def fix_avg_projection(avg_projection, groups):
      if avg_projection.ndim == 3:  # OK
          return avg_projection
      elif avg_projection.ndim == 2:  # Issue #7706
          if groups != 1:
              _warn_old_model()
          return _broadcast_to(
              avg_projection, (groups,) + avg_projection.shape
          )
      raise ValueError("unexpected shape of avg_projection")
  
imports: import functools
  import warnings
  import numpy
  import chainer
  from chainer import configuration
  from chainer import functions
  from chainer import link
  import chainer.serializer
  from chainer.utils import argument
label_desc: Use image node_id 3 for calling a global function with example usage: fix_avg_projection(avg_projection, groups) and returns: avg_projection, _broadcast_to