Get All Rows from an ExtJS Grid Panel

I am updating a grid panel with rows dragged from another grid with has data coming from the database. Now I want to check the grid in which I am dropping items for avoiding duplicates. For this I want to get all the rows currentl开发者_开发百科y there in that grid and I searched everywhere but couldn't find the way to do this. Please help!

yourGrid.getStore().getRange()