code: def get_dimension(self, key, value, **kwargs):
          
          return self._get_object_by_name(self._DIMENSION_ENDPOINT_SUFFIX,
                                          '{0}/{1}'.format(key, value),
                                          **kwargs)
docs: get a dimension by key and value
  
          Args:
              key (string): key of the dimension
              value (string): value of the dimension
  
          Returns:
              dictionary of response