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;
}
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