code: def implode_multi_values(self, name, data):
          
          mkeys = [k for k in data.keys() if k.startswith(name + '.')]
          mvls = [data.pop(k)[0] for k in mkeys]
          if mvls:
              data.setlist(name, mvls)
docs: Due to the way Angular organizes it model, when Form data is sent via a POST request,
          then for this kind of widget, the posted data must to be converted into a format suitable
          for Django's Form validation.