def METHOD_NAME(self):
    # wait for a transform that is not yet available
    buffer = Buffer()
    clock = rclpy.clock.Clock()
    rclpy_time = clock.now()
    transform = self.build_transform('foo', 'bar', rclpy_time)
    coro = buffer.lookup_transform_full_async('foo', rclpy_time, 'bar', rclpy_time, 'foo')
    coro.send(None)
    buffer.set_transform(transform, 'unittest')
    with pytest.raises(StopIteration) as excinfo:
        coro.send(None)
    assert transform == excinfo.value.value
    coro.close()