'Modify a storage group (PUT operation).
:param version: the uv4 version
:param array: the array serial number
:param storagegroup: storage group name
:param payload: the request payload
:returns: status_code -- int, message -- string, server response'

def modify_storage_group(self, array, storagegroup, payload, version=U4V_VERSION):

    return self.modify_resource(array, SLOPROVISIONING, 'storagegroup', payload, version, resource_name=storagegroup)
