/**
  * {@inheritdoc}
  */
 public function assignMergeVarValues(Member $member, MergeVarFieldsInterface $fields)
 {
     $values = $member->getMergeVarValues();
     $member->setEmail($this->getMergeVarValue($values, $fields->getEmail()));
     $member->setPhone($this->getMergeVarValue($values, $fields->getPhone()));
     $member->setFirstName($this->getMergeVarValue($values, $fields->getFirstName()));
     $member->setLastName($this->getMergeVarValue($values, $fields->getLastName()));
 }