/// Get reference to element relative to newest element
T& read(int i){ return mElems[wrapOnce(pos()-i, size())]; }
/// @param[in] from absolute index the read is relative to
/// @param[in] dist distance into past relative to 'from' of the returned element
const T& readFrom(int from, int dist) const {
return mElems[wrapOnce(from-dist, size())];
}
/// Get element at relative index
const T& atRel(int i) const { return mElems[wrapOnce(pos()-i, size())]; }
