I want to show the customer list in map view in Wizard box. But map is not showing but the customer list is showing. Here is my sample code : 

def btn_optimize_route(self):
    partners = self.partner_ids
    view_id = self.env.ref('fs_route_plan.route_customer_map_view').id
    return {
        'name': 'Customers',
        'type': 'ir.actions.act_window',
        'res_model': 'res.partner',
        'domain': [('id', 'in', partners.ids)],
        'view_mode': 'form',
        'views': [
            [(view_id), 'map']
        ],
        'target' : 'new'
    }

How can I show the map in wizard please?