code: def ResNet18(**args):
      model = ResNet(layer=18, block=BasicBlock, **args)
      return model
  
imports: import paddle.nn
  from paddleseg.utils import utils
  from paddleseg.models import layers
  from paddleseg.cvlibs import manager
label_desc: Use image node_id 2 for calling a global function with example usage: ResNet18() and returns: model