class_docstr: Naive model with a simplest structure for testing purposes.
  
  Bare minimum functioning model. The best choice to get things rolling.
  The worst choice to fit and evaluate performance.
docstr: Default parameters.
docstr_tok: ["Default","parameters","."]
code: def get_default_params(cls):
      """Default parameters."""
      params = super().get_default_params()
      params.get("optimizer").hyper_space = hyper_spaces.choice(
          ["adam", "adagrad", "rmsprop"]
      )
      return params
  
imports: import keras
  from matchzoo.engine.base_model import BaseModel
  from matchzoo.engine import hyper_spaces
label_desc: Use image node_id 1 for calling the Naive obj's underlying member method code with example usage: obj.get_default_params(cls) and returns: params