I am using grid with enable virtualization=true and allowediting=true,And for one column applying  like below
And below is code for dpParams
When double click on row which is rendered after scrolling down to some where, write call back executes and giving rowData undefined like shown below.
For firstly rendered records (which are fit to view port on load of page has no issue when edit,it is giving proper rowData).
Please give me solution for this.