<?php
use Microsoft\Graph\Beta\GraphServiceClient;
use Microsoft\Graph\Beta\Generated\RoleManagement\DeviceManagement\RoleAssignments\Item\UnifiedRoleAssignmentMultipleItemRequestBuilderGetRequestConfiguration;
$graphServiceClient = new GraphServiceClient($tokenRequestContext, $scopes);
$requestConfiguration = new UnifiedRoleAssignmentMultipleItemRequestBuilderGetRequestConfiguration();
$queryParameters = UnifiedRoleAssignmentMultipleItemRequestBuilderGetRequestConfiguration::createQueryParameters();
$queryParameters->expand = ["roleDefinition","principals","directoryScopes"];
$requestConfiguration->queryParameters = $queryParameters;
$result = $graphServiceClient->roleManagement()->deviceManagement()->roleAssignments()->byUnifiedRoleAssignmentMultipleId('unifiedRoleAssignmentMultiple-id')->get($requestConfiguration)->wait();