var layout = new SidepanelLayout({
    sidepanel: null,    //RenderNode for sidepanel
    content: null,      //RenderNode for content

    maxPos: 1e4,        // Max position (dragging) (x-coordinate)
    width: 225,         // Open position (x-coordinate)
    transition: {
        duration: 300,
        curve: 'easeOut'
    },
    moveThreshold: 20,  // When should you start moving?
    posThreshold: 138,  // When should sidepanel open?
    velThreshold: 0.75, // When should sidepanel open?
});
this.add(layout);