public function getSerial(){
        if(empty($this->serial)){
            $this->serial = $this->buildSerial();
        }
        $returnValue = $this->serial;

        return (string) $returnValue;
    }
public function getSerial(){
        if(empty($this->serial)){
            $this->serial = $this->buildSerial();
        }
        $returnValue = $this->serial;

        return (string) $returnValue;
    }
public function getSerial ( ) { if ( empty ( $ this -> serial ) ) { $ this -> serial = $ this -> buildSerial ( ) ; } $ returnValue = $ this -> serial ; return ( string ) $ returnValue ; }
Obtain a serial for the instance of the class that implements the

@access public
@author Jerome Bogaerts, <jerome.bogaerts@tudor.lu>
@return string
Obtain a serial for the instance of the class that implements the