public function getOffsetFor($objectNumber)
    {
        foreach ($this->getReaders() as $reader) {
            $offset = $reader->getOffsetFor($objectNumber);
            if ($offset !== false) {
                return $offset;
            }
        }

        return false;
    }
public function getOffsetFor($objectNumber)
    {
        foreach ($this->getReaders() as $reader) {
            $offset = $reader->getOffsetFor($objectNumber);
            if ($offset !== false) {
                return $offset;
            }
        }

        return false;
    }
public function getOffsetFor ( $ objectNumber ) { foreach ( $ this -> getReaders ( ) as $ reader ) { $ offset = $ reader -> getOffsetFor ( $ objectNumber ) ; if ( $ offset !== false ) { return $ offset ; } } return false ; }
Get the offset by an object number.

@param int $objectNumber
@return integer|bool
Get the offset by an object number .