code: def get_model():
      return nn.Sequential(
          block(3, 16),
          block(16, 32),
          block(32, 64),
          block(64, 128),
          block(128, 256),
          nn.AdaptiveAvgPool2d(1),
          Flatten(),
          nn.Linear(256, dls.c),
      )
  
imports: from fastai.vision.all import *
label_desc: Use image node_id 3 for calling a global function with example usage: get_model() and returns: nn