enhancement
There should be an API that allows multiple business objects to be deleted at once.
Implementation
The service method
KBUtils#deleteAll(Iterable<? extends TLObject>)
was introduced to delete multiple `tl:TLObject`s. This method uses the actual API
KnowledgeBase#deleteAll(Collection<? extends KnowledgeItem>)
to delete all specified tl:KnowledgeItems.
Test
TestDBKnowledgeBase#testMassiveItemOperations()