public float getInterpolation(float t) {
            t -= 1.0f;
            return t * t * t * t * t + 1.0f;
        }
Used to track what the expected number of items in the adapter should be.
If the app changes this when we don't expect it, we'll throw a big obnoxious exception.
library/src/main/java/com/daimajia/slider/library/Tricks/ViewPagerEx.java