code: function isOption(option) {
    if (!option || typeof option !== 'object') {
      return false;
    }
  
    let allOptions = Object.keys(defaultRouteOptions);
    let optionKeys = Object.keys(option);
    for (let i = 0; i < optionKeys.length; i++) {
      let key = optionKeys[i];
      if (allOptions.indexOf(key) > -1) {
        return true;
      }
    }
    return false;
  }
docs: Determine if the object contains a valid option.
  
  @method isOption
  @param {Object} option An object with one option value pair.
  @return {Boolean} True if option is a valid option, false otherwise.
  @private