question: private static List < Row > makeTableData ( String tableId , int numRows ) { service . createTable ( tableId ) ; Map < ByteString , ByteString > testData = service . getTable ( tableId ) ; List < Row > testRows = new ArrayList < > ( numRows ) ; for ( int i = 0 ; i < numRows ; ++ i ) { ByteString key = ByteString . copyFromUtf8 ( String . format ( "key%09d" , i ) ) ; ByteString value = ByteString . copyFromUtf8 ( String . format ( "value%09d" , i ) ) ; testData . put ( key , value ) ; testRows . add ( makeRow ( key , value ) ) ; } return testRows ; }
target:  Helper function to create a table and return the rows that it created. 