Start Level 1 Node: SearchesSearchesEnd Level 1 Node: Searches
   Start Level 2 Node: Document SearchDocument SearchEnd Level 2 Node: Document Search
   Start Level 2 Node: Object SearchObject SearchEnd Level 2 Node: Object Search
   Start Level 2 Node: Observation SearchObservation SearchEnd Level 2 Node: Observation Search
   Start Level 2 Node: Message HistoryMessage HistoryEnd Level 2 Node: Message History
   Start Level 2 Node: Unexpected EventsUnexpected EventsEnd Level 2 Node: Unexpected Events