docs: def add_concept_filter(self, concept, concept_name=None):
          """
          Add a concept filter
  
          :param concept: concept which will be used as lowercase string in a search term
          :param concept_name: name of the place where there will be searched for
          """
          if concept in self.query_params.keys():
              if not concept_name:
                  concept_name = concept
              if isinstance(self.query_params[concept], list):
                  if self.es_version == '1':
                      es_filter = {'or': []}
                      for or_filter in self.query_params[concept]:
                          es_filter['or'].append(self._build_concept_term(concept_name, or_filter))
                  else:
                      es_filter = {"bool": {"should": []}}
                      for or_filter in self.query_params[concept]:
                          es_filter["bool"]["should"].append(self._build_concept_term(concept_name, or_filter))
              else:
                  es_filter = self._build_concept_term(concept_name, self.query_params[concept])
              self.filters.append(es_filter)