private void executeFunctionOnPartitionRegion(Function<? super String[]> function,
      Duration duration) {
    executeFunctionOnRegion(function, duration, partitionRegion);
  }
Acceptance tests for function executions timer on cluster with two servers and one locator
geode-assembly/src/acceptanceTest/java/org/apache/geode/metrics/function/executions/FunctionExecutionsTimerClusterTest.java