Pop\Graph\Graph::setFillColor PHP Метод

    public function setFillColor(ColorInterface $color)
    {
        $this->fillColor = $color;
        return $this;
    }

 public function testSetFillColor()
 {
     $g = new Graph($this->imageOptions);
     $g->setFillColor(new Rgb(128, 128, 128));
     $this->assertEquals(new Rgb(128, 128, 128), $g->getFillColor());
 }