in sdap/processors/kelvintocelsius.py [0:0]
    def process_nexus_tile(self, nexus_tile):
        the_tile_type = nexus_tile.tile.WhichOneof("tile_type")
        the_tile_data = getattr(nexus_tile.tile, the_tile_type)
        var_data = from_shaped_array(the_tile_data.variable_data) - 273.15
        the_tile_data.variable_data.CopyFrom(to_shaped_array(var_data))
        yield nexus_tile