code: def get_assets_by_query(self, asset_query=None):
          
          return AssetList(self._provider_session.get_assets_by_query(asset_query),
                           self._config_map)
docs: Gets a list of ``Assets`` matching the given asset query.
  
          arg:    asset_query (osid.repository.AssetQuery): the asset
                  query
          return: (osid.repository.AssetList) - the returned ``AssetList``
          raise:  NullArgument - ``asset_query`` is ``null``
          raise:  OperationFailed - unable to complete request
          raise:  PermissionDenied - authorization failure
          raise:  Unsupported - the ``asset_query`` is not of this service
          *compliance: mandatory -- This method must be implemented.*