/**
  * @param \Magento\Customer\Model\Attribute $attribute
  * @return Data\Eav\AttributeMetadata
  */
 private function _createMetadataAttribute($attribute)
 {
     $options = [];
     if ($attribute->usesSource()) {
         foreach ($attribute->getSource()->getAllOptions() as $option) {
             $options[] = $this->_optionBuilder->setLabel($option['label'])->setValue($option['value'])->create();
         }
     }
     $validationRules = [];
     foreach ($attribute->getValidateRules() as $name => $value) {
         $validationRules[$name] = $this->_validationRuleBuilder->setName($name)->setValue($value)->create();
     }
     $this->_attributeMetadataBuilder->setAttributeCode($attribute->getAttributeCode())->setFrontendInput($attribute->getFrontendInput())->setInputFilter($attribute->getInputFilter())->setStoreLabel($attribute->getStoreLabel())->setValidationRules($validationRules)->setVisible($attribute->getIsVisible())->setRequired($attribute->getIsRequired())->setMultilineCount($attribute->getMultilineCount())->setDataModel($attribute->getDataModel())->setOptions($options)->setFrontendClass($attribute->getFrontend()->getClass())->setFrontendLabel($attribute->getFrontendLabel())->setNote($attribute->getNote())->setIsSystem($attribute->getIsSystem())->setIsUserDefined($attribute->getIsUserDefined())->setSortOrder($attribute->getSortOrder());
     return $this->_attributeMetadataBuilder->create();
 }