VkontakteFormBuilder::buildFields

private function buildFields(array $questions) : array
{
	foreach ($questions  as $key => $externalField)
	{
		if ($fieldName = $this->mapper->getCrmName($externalField))
		{
			$questions[$key] = new LeadAdsField(
				$fieldName,
				self::EMPTY_FIELD_NAME,
				$this->getFormLabel($fieldName),
				$externalField
			);
		}
		else
		{
			unset($questions[$key]);
		}
	}

	return $questions;
}