class_docstr: A tower (Stacked ML model). Consists: logits, architecture, and layers.
code: def logits_spec(self):
      if not hasattr(self, "_logits_spec"):
          raise AssertionError(
              "Calling logits_spec in keras model before calling "
              "__call__ for the model."
          )
      return self._logits_spec
  
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 2 for calling the Tower obj's underlying member method code with example usage: obj.logits_spec() and returns: self