public static VersionedObjectList execute(ExecutablePool pool, Region region,
      Collection<Object> keys, EventID eventId, boolean isRetry, Object callbackArg) {
    RemoveAllOpImpl op = new RemoveAllOpImpl(region, keys, eventId,
        ((PoolImpl) pool).getPRSingleHopEnabled(), callbackArg);
    op.initMessagePart();
    if (isRetry) {
      op.getMessage().setIsRetry();
    }
    return (VersionedObjectList) pool.execute(op);
  }
Does a region removeAll on a server using connections from the given pool to communicate with
the server.

@param pool the pool to use to communicate with the server.
@param region the name of the region to do the removeAll on
@param keys Collection of keys to remove
@param eventId the event id for this op
geode-core/src/main/java/org/apache/geode/cache/client/internal/RemoveAllOp.java