void resetStore() {
    operationReceived = null;
    messageWriteSetReceived = null;
    idsReceived = null;
    storeGetOptionsReceived = null;
    tokenReceived = null;
    maxTotalSizeOfEntriesReceived = null;
  }
Resets variables associated with the {@link Store} impl
ambry-server/src/test/java/com/github/ambry/server/MockStorageManager.java