<?php
use Microsoft\Graph\GraphServiceClient;
use Microsoft\Graph\Generated\Security\Cases\EdiscoveryCases\Item\Searches\Item\MicrosoftGraphSecurityEstimateStatistics\EstimateStatisticsPostRequestBody;
$graphServiceClient = new GraphServiceClient($tokenRequestContext, $scopes);
$requestBody = new EstimateStatisticsPostRequestBody();
$additionalData = [
'statisticsOptions' => 'includeRefiners, includeQueryStats, includeUnindexedStats, advancedIndexing, locationsWithoutHits',
];
$requestBody->setAdditionalData($additionalData);
$graphServiceClient->security()->cases()->ediscoveryCases()->byEdiscoveryCaseId('ediscoveryCase-id')->searches()->byEdiscoverySearchId('ediscoverySearch-id')->microsoftGraphSecurityEstimateStatistics()->post($requestBody)->wait();