class_docstr: Unet utilizing dilation
class_docstr_tok: ["Unet","utilizing","dilation"]
code: def _down_block(in_channels, inner_channels, out_channels):
      layers = []
      layers.append(
          Fire_Down(3, in_channels, inner_channels, out_channels)
      )
      return nn.Sequential(*layers)
  
imports: import torch
  import torch.nn
label_desc: Use image node_id 4 for calling the UNetDilated obj's underlying member method code with example usage: obj._down_block(in_channels, inner_channels, out_channels) and returns: nn