@Override
                public void run() {
                    startSettlingAnimation(child, state);
                }
Sets the state of the bottom sheet. The bottom sheet will transition to that state with
animation.

@param state One of {@link #STATE_COLLAPSED}, {@link #STATE_EXPANDED}, or
             {@link #STATE_HIDDEN}.
vpbs/src/main/java/biz/laenger/android/vpbs/ViewPagerBottomSheetBehavior.java