conversion from 'const float' to 'int', possible loss of data
conversion from 'double' to 'int', possible loss of data
conversion from 'float' to 'int', possible loss of data
The InsertFunctor for cells was calling localRotateObject() for all references which set the mChanged flag in RefData to true.
Also clean up RefData interface slightly.
Checking for emptiness using size() might be inefficient, because
it can take linear time, while empty() is guaranteed to take only
constant time.
For non-primitive types, postfix ++ operators are inefficient
compared to prefix ++ operators, because post-increment usually
involves keeping a copy of the previous value around.
