public function testChin()
{
$snippet = $this->snippetFromMethod(Landmarks::class, 'chin');
$snippet->addLocal('landmarks', $this->landmarks);
$res = $snippet->invoke();
$this->assertEquals($this->positionAggregate(['gnathion' => 'CHIN_GNATHION', 'left' => 'CHIN_LEFT_GONION', 'right' => 'CHIN_RIGHT_GONION']), $res->output());
}