class_docstr: A tower (Stacked ML model). Consists: logits, architecture, and layers.
code: def layer_tensors(self):
      if not hasattr(self, "_layer_tensors"):
          raise AssertionError(
              "Calling layer_tensors in keras model before calling"
              " __call__ for the model."
          )
      return self._layer_tensors
  
file_path: model_search/model_search/architecture/tower.py
imports: from model_search.architecture import architecture_utils
  import tensorflow.compat.v2
label_desc: Use image node_id 4 for calling the Tower obj's underlying member method code with example usage: obj.layer_tensors() and returns: self