Snaps to a page when pagination is enabled.
function _snapToPage() {

        // Check whether pagination is active
        if (!this.options.paginated ||
            this._scroll.scrollForceCount || //don't paginate while moving
            (this._scroll.springPosition !== undefined)) {
            return;
        }

        // When the energy is below the thresshold, paginate to the current page
        var item;
        switch (this.options.paginationMode) {
            case PaginationMode.SCROLL:
                if (!this.options.paginationEnergyThreshold || (Math.abs(this._scroll.particle.getEnergy()) <= this.options.paginationEnergyThreshold)) {
                    item = this.options.alignment ? this.getLastVisibleItem() : this.getFirstVisibleItem();
                    if (item && item.renderNode) {
                        this.goToRenderNode(item.renderNode);
                    }
                }
                break;
            case PaginationMode.PAGE:
                item = this.options.alignment ? this.getLastVisibleItem() : this.getFirstVisibleItem();
                if (item && item.renderNode) {
                    this.goToRenderNode(item.renderNode);
                }
                break;
        }
    }