liyuqian 43f4c1d3c7 Make flow layers' attributes immutable (flutter/engine#9176)
For https://github.com/flutter/flutter/issues/33807

We still need to make layers' children immutable for full immutability.
That will require us to change the SceneBuilder API to build the layer
bottom up instead of top down (post-order traversal instead of pre-order
traversal).
2019-06-10 13:09:37 -07:00
..