Option "centerPadding" not working.

[truongle7793]

i try to add centerPadding to my slick config but it doing nothing.
$scope.slickConfig = {
enabled: true,
autoplay: true,
slidesToShow: 1,
dots: true,
infinite: false,
centerMode: true,
centerPadding: '100px',
initialSlide: 3,
variableWidth: true,
arrows: true,
method: {},
};
for now i add margin css for the .slick-slide class but is there otherway ?