code: def fetch_interfaces(self):
          
          return get('ISteamWebAPIUtil', 'GetSupportedAPIList', 1,
              https=self.https,
              apihost=self.apihost,
              caller=None,
              session=self.session,
              params={'format': 'json',
                      'key': self.key,
                      },
              )
docs: Returns a dict with the response from ``GetSupportedAPIList``
  
          :return: :class:`dict` of all interfaces and methods
  
          The returned value can passed to :meth:`load_interfaces`