text: let {thisorthat} = require ('thisorthat.js');
  
  let config_a = {
      min: 1,
      max: 100,
      image: false
  };
  let config_b = {
      min: 1,
      max: 100,
      image: true
  };
  let possible_configs = [
      config_a,
      config_b
  ];
  
  
  // Given a tuple of objects, choose one and persist that choice across sessions
  chosen_config = thisorthat('my_app', possible_configs)
  
  