question: private static void groupCorrespodingInfoBasedOnTask ( TableBlockInfo info , TaskBlockInfo taskBlockMapping , String taskNo ) { List < TableBlockInfo > blockLists = taskBlockMapping . getTableBlockInfoList ( taskNo ) ; if ( null != blockLists ) { blockLists . add ( info ) ; } else { blockLists = new ArrayList < > ( CarbonCommonConstants . DEFAULT_COLLECTION_SIZE ) ; blockLists . add ( info ) ; taskBlockMapping . addTableBlockInfoList ( taskNo , blockLists ) ; } }
target:  Grouping the taskNumber and list of TableBlockInfo.