Bapi Name for Undelete the PO from ME22n

I have delete the PO items from ME22n by using BAPI. But in the same way I want to undelete/unblock the PO items from ME22N. Can any one help me in this regard.

I have used the field bapimepoitem-delete_ind = 'X' for delete the PO from me22n. If I would get the field name for undelete / unblock is enough.