public void setThumbColor(@ColorInt int color) {
        mThumbActiveColor = color;
        mThumb.setColor(color);
        mRecyclerView.invalidate(mInvalidateRect);
    }
Returns whether the specified points are near the scroll bar bounds.
android/third_party/recyclerview-fastscroll/src/main/java/com/simplecityapps/recyclerview_fastscroll/views/FastScroller.java