code: def add_colorbar(self, *args, **kwargs):
          
          warnings.warn(
              "{0}.add_colorbar was renamed {0}.colorbar, this warnings will "
              "result in an error in the future".format(type(self).__name__),
              DeprecationWarning)
          return self.colorbar(*args, **kwargs)
docs: DEPRECATED, use `Plot.colorbar` instead