class_docstr: A tower (Stacked ML model). Consists: logits, architecture, and layers.
code: def previous_model_dir(self):
      return getattr(self, "_prev_model_dir", None)
  
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 6 for calling the Tower obj's underlying member method code with example usage: obj.previous_model_dir() and returns: getattr