code: def _pair(x):
      if hasattr(x, "__getitem__"):
          return x
      return x, x
  
file_path: chainer/chainer/functions/connection/local_convolution_2d.py
imports: from six import moves
  import chainer
  from chainer import backend
  from chainer import function_node
  from chainer.utils import type_check
  from chainer import variable
label_desc: Use image node_id 1 for calling a global function with example usage: _pair(x) and returns: x,  x, x