'Process extended attributes for update port.
:param plugin_context: plugin request context
:param data: dictionary of incoming port data
:param result: port dictionary to extend
Called inside transaction context on plugin_context.session to
validate and update any extended port attributes defined by this
driver. Extended attribute values, whether updated or not,
must also be added to result.'

def process_update_port(self, plugin_context, data, result):

    pass
