public function testSetIsReferenceReturned()
{
$func = new PhpFunction();
$this->assertFalse($func->isReferenceReturned());
$this->assertSame($func, $func->setReferenceReturned(true));
$this->assertTrue($func->isReferenceReturned());
$this->assertSame($func, $func->setReferenceReturned(false));
$this->assertFalse($func->isReferenceReturned());
}
