LeadSumStatistics::prepareGroupingExtras

static function prepareGroupingExtras(array &$groupings)
{
	$sourceKey = \CCrmOwnerType::LeadName.':'.self::GROUP_BY_SOURCE;
	if(isset($groupings[$sourceKey]))
	{
		return;
	}

	self::includeModuleFile();
	$groupings[$sourceKey] = array(
		'entity' => \CCrmOwnerType::LeadName,
		'title' => GetMessage('CRM_LEAD_GROUP_BY_SOURCE'),
		'name' => self::GROUP_BY_SOURCE
	);
}