question: public WebBasketLine add ( int M_Product_ID , String Name , BigDecimal Qty , BigDecimal Price ) { for ( int i = 0 ; i < m_lines . size ( ) ; i ++ ) { WebBasketLine wbl = ( WebBasketLine ) m_lines . get ( i ) ; if ( wbl . getM_Product_ID ( ) == M_Product_ID ) { wbl . addQuantity ( Qty ) ; getTotal ( true ) ; return wbl ; } } WebBasketLine wbl = new WebBasketLine ( M_Product_ID , Name , Qty , Price ) ; return add ( wbl ) ; }
target:  Add Line. Adds qty to the line, if same product 