At time 0, I make a Mutation with put("a", "b", "c");
At time 1, I do it again.
Do I get:
a) two copies of the same data with different timestamps?
b) an error?
c) something else?
If the idea I'm looking for is to end up with one item without doing a
scan each time to see if it's out there, is there a 'garbage
collection' cliche for cleaning out redundant items that differ only