docs: def evaluate_callables(data):
      """
      Call any callable values in the input dictionary;
      return a new dictionary containing the evaluated results.
      Useful for lazily evaluating default values in ``build`` methods.
  
      >>> data = {"spam": "ham", "eggs": (lambda: 123)}
      >>> result = evaluate_callables(data)
      >>> result == {'eggs': 123, 'spam': 'ham'}
      True
      """
      sequence = ((k, v() if callable(v) else v) for k, v in data.items())
      return type(data)(sequence)