code: def updateall(self, *args, **kwargs):
          
          self._update_updateall(False, *args, **kwargs)
          return self
docs: Update this dictionary with the items from <mapping>, replacing
          existing key:value items with shared keys before adding new key:value
          items.
  
          Example:
            omd = omdict([(1,1), (2,2)])
            omd.updateall([(2,'two'), (1,'one'), (2,222), (1,111)])
            omd.allitems() == [(1, 'one'), (2, 'two'), (2, 222), (1, 111)]
  
          Returns: <self>.