sheet2.groupRow( 5, 14 );
sheet2.groupRow( 7, 14 );
sheet2.groupRow( 16, 19 );
sheet2.groupColumn( (short)4, (short)7 );
sheet2.groupColumn( (short)9, (short)12 );
sheet2.groupColumn( (short)10, (short)11 );
sheet2.setRowGroupCollapsed( 7, true );
//sheet1.setRowGroupCollapsed(7,false);