core-bundle/src/Resources/contao/library/Contao/Model/Collection.php
public function getRelated($strKey)
	{
		if ($this->intIndex < 0)
		{
			$this->first();
		}

		return $this->arrModels[$this->intIndex]->getRelated($strKey);
	}
public function getRelated($strKey)
	{
		if ($this->intIndex < 0)
		{
			$this->first();
		}

		return $this->arrModels[$this->intIndex]->getRelated($strKey);
	}
public function getRelated ( $ strKey ) { if ( $ this -> intIndex < 0 ) { $ this -> first ( ) ; } return $ this -> arrModels [ $ this -> intIndex ] -> getRelated ( $ strKey ) ; }
Lazy load related records

@param string $strKey The property name

@return Collection|Model The model or a model collection if there are multiple rows
Lazy load related records