docs: function validateOptionsConstraints(optionsConstraints) {
    if (optionsConstraints.within &&
      !(optionsConstraints.within === 'interactive_message' ||
        optionsConstraints.within === 'block_actions' ||
        optionsConstraints.within === 'dialog')
    ) {
      return new TypeError('Within must be \'block_actions\', \'interactive_message\' or \'dialog\'');
    }
  
    // We don't need to validate unfurl, we'll just cooerce it to a boolean
    return false;
  }