boolean basicRemoveOverflow(OverflowOplog oo) {
    if (lastOverflowWrite == oo) {
      lastOverflowWrite = null;
    }
    return overflowMap.remove(oo.getOplogId(), oo);
  }
@param minSize the minimum size this oplog can be
geode-core/src/main/java/org/apache/geode/internal/cache/OverflowOplogSet.java