Pop\Pdf\Object\Object::define PHP Метод

    public function define($str)
    {
        $this->def = $str;
        if (stripos($this->def, '/xobject') !== false) {
            $this->isXObject = true;
        }
    }

 public function testSetAndGetDef()
 {
     $o = new Object(5);
     $o->define('some def /Xobject something');
     $this->assertEquals('some def /Xobject something', $o->getDef());
     $this->assertTrue($o->isXObject());
     $this->assertEquals(40, $o->getByteLength());
 }