@Retained
  protected Entry getEntry(Region<?, ?> region, Object key, Object callbackArg,
      ServerConnection servConn) {
    return getEntryRetained(region, key, callbackArg, servConn);
  }
This method was added so that Get70 could, by default, call getEntryRetained, but the subclass
GetEntry70 could override it and call getValueAndIsObject. If we ever get to the point that no
code needs to call getValueAndIsObject then this method can go away.
geode-core/src/main/java/org/apache/geode/internal/cache/tier/sockets/command/Get70.java