bool RegisterItemPlayer ( [TSubclassOf](API\Runtime\CoreUObject\Templates\TSubclassOf)< [USequencerPlaylistItem](API\Plugins\SequencerPlaylists\USequencerPlaylistItem) > ItemClass, [FSequencerPlaylistItemPlayerFactory](API\Plugins\SequencerPlaylists\FSequencerPlaylistItemPlayerFact-) PlayerFactory )