RequisiteField::getValuesFromData

protected function getValuesFromData(array $data): array
{
	$result = [];

	$fieldName = $this->getFieldName();

	if (array_key_exists($fieldName, $data) && $data[$fieldName] !== null)
	{
		$value = $data[$fieldName];
		if (!is_array($value))
		{
			$value = [$value];
		}
		if(!empty($value))
		{
			foreach ($value as $singleValue)
			{
				$singleValue = !is_array($singleValue) ? (string)$singleValue : '';
				if ($singleValue !== '')
				{
					$result[] = $singleValue;
				}
			}
		}
	}

	return $result;
}