* adding fetching only last level of relations
* further implementaion of fetching last level
* implementation of fetching last level
* implementation of fetching last level
* draft of fetching only last level
* removal of unnecessary new method
* cleanup and formatting
* cleanup and formatting
* formatting
* formatting
* formatting
* final version of fetching only last level, the boolean added to the relation search parameters
* fetchLastLevelOnly added to some more search queries
* fixed tests to include fetchLastLevelOnly parameter
* removed unnecessary use of fetchLastLevelOnly parameter
* removed default value of fetchLastLevelOnly
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