code: def get_settings_by_keyword(keyword=None):
      
      settings = []
      if keyword is None:
          # iterate over all the schemas to return all settings
          for key, ischemas in CONTROLPANEL_INTERFACE_MAPPING.items():
              settings_from_ifaces = map(get_settings_from_interface, ischemas)
              settings_from_key = {k: v for d in settings_from_ifaces for k, v in d.items()}
              settings.append({key: settings_from_key,
                               "api_url": url_for("senaite.jsonapi.v1.settings", key=key)})
          return settings
      # if keyword has value then get only the settings associated to the key
      settings_from_ifaces = map(get_settings_from_interface, CONTROLPANEL_INTERFACE_MAPPING[keyword])
      settings_from_key = {k: v for d in settings_from_ifaces for k, v in d.items()}
      settings.append({keyword: settings_from_key,
                       "api_url": url_for("senaite.jsonapi.v1.settings", key=keyword)})
      return settings
docs: Get the settings associated to the specified keyword or, if
       keyword is None, get all the settings.
  
      :param keyword: settings to be retrieved
      :return: dictionary with the settings plus a key to identify from which
      keyword where retrieved.