private void basicInvalidate(final EntryEventImpl event, boolean invokeCallbacks)
      throws EntryNotFoundException {
    final boolean forceNewEntryInClientCache = serverRegionProxy != null
        && getConcurrencyChecksEnabled();
    basicInvalidate(event, invokeCallbacks, forceNewEntryInClientCache);
  }
Return true if invalidation occurred; false if it did not, for example if it was already
invalidated
geode-core/src/main/java/org/apache/geode/internal/cache/LocalRegion.java