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				@@ -499,7 +499,7 @@ public class ImGroupServiceImpl extends ServiceImpl<ImGroupDao, ImGroup> impleme 
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				                 break; 
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				             } 
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				             if(historyMessages.size() > 0){ 
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				-                //historyMessageDao.batchInsert(historyMessages.stream().sorted(Comparator.comparing(ImHistoryMessage::getDateTime)).collect(Collectors.toList()),HistoryMessage.class); 
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				+                //imGroupDao.batchInsert(historyMessages.stream().sorted(Comparator.comparing(ImHistoryMessage::getDateTime)).collect(Collectors.toList()),HistoryMessage.class); 
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				             } 
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				         } catch (IOException e) { 
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				             e.printStackTrace(); 
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