docs: def add_query(self, key_val={}):
          """
          Add an es_dsl query object to the es_dsl Search object
  
          :param key_val: a key-value pair(dict) containing the query to be added to the search object
          :returns: self, which allows the method to be chainable with the other methods
          """
  
          q = Q("match", **key_val)
          self.search = self.search.query(q)
          return self