code: def add_feed(self, feedlike, **kwargs):
          
          if 'fnum' in kwargs:
              fnum = kwargs['fnum']
              del kwargs['fnum']
          else:
              fnum = None
  
          if isinstance(feedlike, bFeed):
              munging = feedlike.munging
              if 'munging' in kwargs:
                  explicit_munging = kwargs['munging'].as_odict
                  for key in explicit_munging:
                      munging[key] = explicit_munging[key]
              fed = Feed(self, feedlike.ftype,
                         feedlike.sourcing,
                         munging,
                         feedlike.meta,
                         fnum)
  
          elif isinstance(feedlike, Feed):
              fed = feedlike
          else:
              raise Exception("Invalid Feed {}".format(repr(feedlike)))
          self.feeds.append(fed)
          
          objs = object_session(self)
          objs.add(fed)
          objs.commit()
docs: Add a feed to the Symbol
          
          Parameters
          ----------
          feedlike : Feed or bFeed-like
              The feed template, or Feed object to be added.
          kwargs
              Munging instructions