Mapping/ItemMetaData.php
public function addSortableHit($hitIdentifier)
	{
		if(!in_array($hitIdentifier, $this->sortableHits))
		{
			$this->sortableHits[] = $hitIdentifier;
		}
		return $this;
	}
public function addSortableHit($hitIdentifier)
	{
		if(!in_array($hitIdentifier, $this->sortableHits))
		{
			$this->sortableHits[] = $hitIdentifier;
		}
		return $this;
	}
public function addSortableHit ( $ hitIdentifier ) { if ( ! in_array ( $ hitIdentifier , $ this -> sortableHits ) ) { $ this -> sortableHits [ ] = $ hitIdentifier ; } return $ this ; }
Add sortable hit.

@param string $hitIdentifier
@return ItemMetaData
Add sortable hit .