Exception when calling graph-rbac API

I use below code get user's group by his object id.
```
UserGetMemberGroupsParametersInner parametersInner = new UserGetMemberGroupsParametersInner()
.withAdditionalProperties(Collections.emptyMap())
.withSecurityEnabledOnly(false);
List groups = azure.activeDirectoryUsers().inner().getMemberGroups(oid, parametersInner);
```

But it throws errors like:
```
com.microsoft.azure.management.graphrbac.GraphErrorException: Status code 400, {"odata.error":
{"code":"Request_BadRequest","message":{"lang":"en","value":"The parameter 'additionalProperties' in
the request payload is not a valid parameter for the function import
'getMemberGroups'."},"requestId":"...","date":"2018-09-18T04:15:00"}}
```

It seems its additionalProperties cannot be empty. But I have no idea where to get the definition for the parameters. I only find Azure Rest API with 1.6 version and it is outdated which does not have this parameters. How to set this parameter?

Start at the UserGetMemberGroupsParametersInner construction and the azure.activeDirectoryUsers().inner().getMemberGroups(oid, parametersInner) call. Inspect the generated request payload and compare it with the Graph RBAC getMemberGroups API definition, focusing on why additionalProperties is serialized. Done means the request no longer sends an invalid parameter and the user's groups can be retrieved successfully.

Scritto dal modello di indicizzazione a partire dal testo della issue.