question: private void ensureTupleArray ( int row ) { int nrows = Math . max ( m_table . getRowCount ( ) , row + 1 ) ; if ( m_tuples == null ) { m_tuples = new TableTuple [ nrows ] ; } else if ( m_tuples . length < nrows ) { int capacity = Math . max ( ( 3 * m_tuples . length ) / 2 + 1 , nrows ) ; TableTuple [ ] tuples = new TableTuple [ capacity ] ; System . arraycopy ( m_tuples , 0 , tuples , 0 , m_tuples . length ) ; m_tuples = tuples ; } }
target:  Ensure the tuple array exists.