Add method to wizard to get manifest

__init__.py

@@ -1,9 +1,10 @@
-# This file is part of the carrier_send_shipments_seurvalencia module for Tryton.
+# This file is part of carrier_send_shipments_seurvalencia module for Tryton.
 # The COPYRIGHT file at the top level of this repository contains
 # copyright notices and license terms. the full
 from trytond.pool import Pool
 from .api import *
 from .shipment import *
+from .manifest import *
 
 
 def register():
@@ -11,3 +12,6 @@ def register():
         CarrierApi,
         ShipmentOut,
         module='carrier_send_shipments_seurvalencia', type_='model')
+    Pool.register(
+        StockManifest,
+        module='carrier_send_shipments_seurvalencia', type_='wizard')

manifest.py

@@ -0,0 +1,16 @@
+# This file is part of carrier_send_shipments_seurvalencia module for Tryton.
+# The COPYRIGHT file at the top level of this repository contains
+# the full copyright notices and license terms.
+from seurvalencia import Picking
+from trytond.pool import PoolMeta
+
+__all__ = ['StockManifest']
+__metaclass__ = PoolMeta
+
+
+class StockManifest:
+    __name__ = 'stock.manifest'
+
+    def get_manifest_seurvalencia(self, api, from_date, to_date):
+        with Picking(api.username, api.password, api.debug) as picking_api:
+            return picking_api.info()