class_docstr: A mixin class connecting the input nodes and heads with the adapters.
  
  This class is extended by the input nodes and the heads. The AutoModel calls
  the functions to get the corresponding adapters and pass the information
  back to the input nodes and heads.
docstr: Get the corresponding Adapter.
  
  # Returns
      An instance of a subclass of autokeras.engine.Adapter.
code: def get_adapter(self):
      """Get the corresponding Adapter.
  
      # Returns
          An instance of a subclass of autokeras.engine.Adapter.
      """
      raise NotImplementedError
  
file_path: autokeras/autokeras/engine/io_hypermodel.py
imports: from autokeras.engine import block
label_desc: Use image node_id 3 for calling the IOHyperModel obj's underlying member method code with example usage: obj.get_adapter() without return types