@Override
  public boolean isHA() {
    return false;
  }
Specifies whether the function is eligible for re-execution (in case of failure).

@return whether the function is eligible for re-execution.
@see RegionFunctionContext#isPossibleDuplicate()
@since GemFire 6.5
geode-web-api/src/integrationTest/java/org/apache/geode/rest/internal/web/controllers/EchoArgumentFunction.java