nickname = $nickname; $this->extraTime = $extraTime; } /** * @return bool */ public function isExtraTime(): bool { return $this->extraTime; } /** * @param bool $extraTime */ public function setExtraTime(bool $extraTime): void { $this->extraTime = $extraTime; } /** * @param String $nickname */ public function setNickname(string $nickname): void { $this->nickname = $nickname; } public function __toString(): string { return "Student : ".parent::__toString()." ".$this->nickname." ".$this->extraTime; } }