question: public void importFrom ( DataInputStream in ) throws IOException { seqId = in . readInt ( ) ; nRows = info . isRowBlockEnabled ( ) ? in . readInt ( ) : 1 ; importFrom ( in , primaryKey ) ; for ( int i = 0 ; i < info . colBlocks . length ; i ++ ) { ByteArray cb = cellBlocks [ i ] ; importFrom ( in , cb ) ; } }
target:  read data from given input stream, like deserialize 