The BaseGraphQLMultiQuery can also be used to retrieve two unrelated ObjectDataSenderBuilders in the same query, e.g. spaces and unrelated people. Creating the ObjectDataSenderBuilders is the same as if they were being retrieved via two separate queries. Instead you can just add both ObjectDataSenderBuilders to a BaseGraphQLMultiQuery.
Because no aliases are required, the DataContainer will still be able to be parsed by Gson to the relevant child object.