class_docstr: Creates a very simple dropdown listing choices from which entries can be selected.
  Preprocessing: Preprocessing: passes the value of the selected dropdown entry as a {str}.
  Postprocessing: expects a {str} corresponding to the value of the dropdown entry to be selected.
  Examples-format: a {str} representing the drop down value to select.
  Demos: sentence_builder, titanic_survival
code: def _warn_if_invalid_choice(self, y):
      if y not in [value for _, value in self.choices]:
          warnings.warn(
              f"The value passed into gr.Dropdown() is not in the list of choices. Please update the list of choices to include: {y}."
          )
  
file_path: gradio/gradio/_simple_templates/simpledropdown.py
imports: from __future__ import annotations
  import warnings
  from typing import Any, Callable
  from gradio.components.base import FormComponent
  from gradio.events import Events
label_desc: Use image node_id 5 for calling the SimpleDropdown obj's underlying member method code with example usage: obj._warn_if_invalid_choice(y) without return types