Hi , I am new to GXT3.0/GWT2.5 in my application ,I am planning to use tree grid ,which will display combo box at third level of the grid ,Combo box will have like 2 values which can be updateable ,if we update particular combo box it should update other combo box as well with same column values ,suppose we have productName and productDesc those will form composite primary key and status like avalilable or not available, so when we update status from combobox it sholud also update status of other combobox with same product name and product desc ,Is this posssible?