src/Observers/AbstractAttributeImportObserver.php
public function handle(SubjectInterface $subject)
    {

        // initialize the row
        $this->setSubject($subject);
        $this->setRow($subject->getRow());

        // process the functionality and return the row
        $this->process();

        // return the processed row
        return $this->getRow();
    }
public function handle(SubjectInterface $subject)
    {

        // initialize the row
        $this->setSubject($subject);
        $this->setRow($subject->getRow());

        // process the functionality and return the row
        $this->process();

        // return the processed row
        return $this->getRow();
    }
Will be invoked by the action on the events the listener has been registered for.

@param \TechDivision\Import\Subjects\SubjectInterface $subject The subject instance

@return array The modified row
@see \TechDivision\Import\Observers\ObserverInterface::handle()