Algo-Web / POData-Laravel

        $resourceType = $entityTypes[$thisClass];

        // if $r is in $combined keys, then its in keyspaces of both $entityTypes and $resourceSets

        $combinedKeys = array_intersect(array_keys($entityTypes), array_keys($resourceSets));

        foreach ($rel["HasOne"] as $n => $r) {

            $r = trim($r, '\\');

            if (in_array($r, $combinedKeys)) {

                $targResourceSet = $resourceSets[$r];

                $metadata->addResourceReferenceProperty($resourceType, $n, $targResourceSet);

            }

        }

        foreach ($rel["HasMany"] as $n => $r) {

            $r = trim($r, '\\');

            if (in_array($r, $combinedKeys)) {

                $metadata->addResourceReferenceProperty($resourceType, $n, $targResourceSet);

            }

        }

        foreach ($rel["HasMany"] as $n => $r) {

            $r = trim($r, '\\');

            if (in_array($r, $combinedKeys)) {

                $targResourceSet = $resourceSets[$r];

                $metadata->addResourceSetReferenceProperty($resourceType, $n, $targResourceSet);

            }

        }

        return $rel;

    }