code: def __call__(self, x):
      x = self.backbone(x)
      x = nnx.relu(x)
      x = self.head(x)
      return x
  
imports: import jax
  from flax.experimental import nnx
label_desc: Use image node_id 2 for calling the Classifier obj's underlying member method code with example usage: obj.__call__(x) and returns: x