public int getLast() {
        if (mHead == mTail) throw new ArrayIndexOutOfBoundsException();
        return mElements[(mTail - 1) & mCapacityBitmask];
    }
Get last integer of the CircularIntArray.

@return The last integer.
@throws {@link ArrayIndexOutOfBoundsException} if CircularIntArray is empty.
android/android_framework/base/src/main/java/github/tornaco/android/thanos/core/util/collection/CircularIntArray.java