CrmField::explodeEntityElement

protected function explodeEntityElement(string $entityElement): ?array
{
	if ($this->needExplodeValue($entityElement))
	{
		[$entityTypePrefix, $entityElementId] = explode('_', $entityElement);
		$elementWasExploded = true;
	}
	elseif (empty($this->entityTypes[0]))
	{
		return null;
	}
	else
	{
		$entityTypePrefix = \CCrmOwnerTypeAbbr::ResolveByTypeName($this->entityTypes[0]);
		$entityElementId = $entityElement;
		$elementWasExploded = false;
	}

	return [
		$entityTypePrefix,
		(int)$entityElementId,
		$elementWasExploded,
	];
}