code: def _do_downsample(x, kernel_size=2, stride=2):
      return F.max_pool2d(x, kernel_size=kernel_size, stride=stride)
  
imports: import torch.nn
  import torch.nn.init
  import torch.nn.functional
  import numpy
label_desc: Use image node_id 3 for calling the FusionNet obj's underlying member method code with example usage: obj._do_downsample(x, kernel_size, stride) and returns: F