Method switchDown

tiling.js:1128–1128

(loop)

    switchRight(loop) { return this.switch(Meta.MotionDirection.RIGHT, loop); }
    switchUp(loop) { return this.switch(Meta.MotionDirection.UP, loop); }
    switchDown(loop) { return this.switch(Meta.MotionDirection.DOWN, loop); }
    switch(direction, loop) {
        let space = this;
        let index = space.selectedIndex();