Spencer Rathbun85a1f0b1f8Fixes #987. Ported the Accumulator base class. There are no test cases in mongo, since it won't work by itself, so no test cases are included.
85a1f0b1f8
Fixes #987. Ported the Accumulator base class. There are no test cases in mongo, since it won't work by itself, so no test cases are included.