(self, doc)
Migrate a single document

        :param doc: The document dict to be migrated.
        :returns: True if doc was migrated else False. If this returns False
        the document migration will be retried later.
Migrate a single document
Migrate a single document
def migrate(self, doc):
        """Migrate a single document

        :param doc: The document dict to be migrated.
        :returns: True if doc was migrated else False. If this returns False
        the document migration will be retried later.
        """
        raise NotImplementedError
def migrate ( self , doc ) : raise NotImplementedError