I got this code from stock.py file and line number 163

'complete_name': fields.function(_complete_name, type='char', size=256, string="Location Name",
                    store={'stock.location': (_get_sublocations, ['name', 'location_id'], 10)}),

please give me a explanation about below store attribute in above field.

can we use fields.function( with type='many2one' ? if can please give me a reference sample code or sample model class in openerp 7