xmlParseUserData = userData => {
  const data = []

  if (userData.length) {
    const values = userData[0].getElementsByTagName('value')

    for (let i = 0; i < values.length; i++) {
      data.push(values[i].textContent)
    }
  }

  return data
}
Convert field user data to userData
@private
@param  {NodeList} userData  DOM elements
@return {Array} optionData array