<?php
use Microsoft\Graph\Beta\GraphServiceClient;
use Microsoft\Graph\Beta\Generated\Security\Cases\EdiscoveryCases\Item\ReviewSets\Item\Files\FilesRequestBuilderGetRequestConfiguration;
$graphServiceClient = new GraphServiceClient($tokenRequestContext, $scopes);
$requestConfiguration = new FilesRequestBuilderGetRequestConfiguration();
$queryParameters = FilesRequestBuilderGetRequestConfiguration::createQueryParameters();
$queryParameters->top = 5;
$requestConfiguration->queryParameters = $queryParameters;
$result = $graphServiceClient->security()->cases()->ediscoveryCases()->byEdiscoveryCaseId('ediscoveryCase-id')->reviewSets()->byEdiscoveryReviewSetId('ediscoveryReviewSet-id')->files()->get($requestConfiguration)->wait();