BaseUfComponent::getFieldName

protected function getFieldName(): string
{
	$nameFromAdditionalParameters = ($this->additionalParameters['NAME'] ?? null);
	$nameFromUserField = ($this->userField['FIELD_NAME'] ?? null);

	$fieldName = $nameFromAdditionalParameters ?? $nameFromUserField;
	if (!$fieldName)
	{
		return '';
	}

	if($this->isMultiple() && !mb_substr_count($fieldName, '[]'))
	{
		$fieldName .= '[]';
	}

	return $fieldName;
}