code: def _conv_output_length(input_length, filter_size, stride):
      output_length = input_length - filter_size + 1
      return output_length
  
file_path: chainer/chainer/links/connection/local_convolution_2d.py
imports: from chainer.functions.connection import local_convolution_2d
  from chainer import initializers
  from chainer import link
  from chainer import variable
label_desc: Use image node_id 2 for calling a global function with example usage: _conv_output_length(input_length, filter_size, stride) and returns: output_length